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{{Short description|Condition of not having enough sleep}}
:''"All-nighter" redirects here. For other uses, see [[The Allnighter]].''
{{cs1 config|name-list-style=vanc|display-authors=6}}
'''Sleep deprivation''' is a general lack of the necessary amount of [[sleep]]. This may occur as a result of [[sleep disorders]], active choice or deliberate inducement such as in [[interrogation]] or for [[torture]].<ref name="SleepDepAdult">{{cite journal | first = | last = | | title = http://library.cqpress.com/cqresearcher/ppv.php?id=cqresrre1998062600| year = }}</ref>
{{Use dmy dates|date=January 2021}}
{{Distinguish|Insomnia}}
[[File:2023 CDC recommendations for amount of sleep needed, by age.svg |thumb |The Centers for Disease Control and Prevention's (CDC) recommendations for the amount of sleep needed decrease with age.<ref name=CDC_sleep/> While sleep quantity is important, good sleep quality is also essential to avoid sleeping disorders.<ref name=CDC_sleep>{{cite web |title=How Much Sleep Do I Need? |url=https://www.cdc.gov/sleep/about_sleep/how_much_sleep.html |website=CDC.gov |date=14 September 2022 |publisher=Centers for Disease Control and Prevention (CDC) |archive-url=https://web.archive.org/web/20231102143914/https://www.cdc.gov/sleep/about_sleep/how_much_sleep.html |archive-date=2 November 2023 |quote=Last Reviewed: September 14, 2022. Source: National Center for Chronic Disease Prevention and Health Promotion, Division of Population Health. |url-status=live }}</ref>]]
{{Infobox medical condition (new)
| name = Sleep deprivation
| image =
| caption =
| field = [[Sleep medicine]]
| symptoms = [[Fatigue]], [[Periorbital puffiness|eye bags]], poor memory, irritable mood, weight gain
| complications = Car and work accidents, weight gain, [[cardiovascular disease]]
| onset =
| duration =
| causes = [[Insomnia]], [[sleep apnea]], [[stimulant]]s (caffeine, amphetamine), voluntary imposition (school, work), [[mood disorder]]s
| risks =
| diagnosis =
| differential =
| prevention =
| treatment = [[Cognitive behavioral therapy]], [[caffeine]] (to induce alertness), [[sleeping pill]]s
| medication =
| prognosis =
| frequency =
| deaths =
}}
'''Sleep deprivation''', also known as '''sleep insufficiency'''<ref name=":4">{{cite book | vauthors = Amin F, Sankari A | chapter= Sleep Insufficiency |date=2022 | chapter-url=http://www.ncbi.nlm.nih.gov/books/NBK585109/ | title = StatPearls |access-date=2023-05-18 |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=36256756 }}</ref> or '''sleeplessness''', is the condition of not having adequate duration and/or quality of [[sleep]] to support decent alertness, performance, and health. It can be either [[Chronic (medicine)|chronic]] or [[Acute (medicine)|acute]] and may vary widely in severity. All known animals sleep or exhibit some form of sleep behavior, and the importance of sleep is self-evident for humans, as nearly a third of a person's life is spent sleeping.<ref name=":4" /> Sleep deprivation is common as it affects about one-third of the population.<ref>{{cite book |doi=10.1016/B978-0-12-815373-4.00002-2 |chapter=Epidemiology of insufficient sleep and poor sleep quality |title=Sleep and Health |date=2019 |last1=Grandner |first1=Michael A. |pages=11–20 |isbn=978-0-12-815373-4 }}</ref>


The National Sleep Foundation recommends that adults aim for 7–9 hours of sleep per night, while children and teenagers require even more. For healthy individuals with normal sleep, the appropriate sleep duration for school-aged children is between 9 and 11 hours.<ref>{{cite journal |last1=Hirshkowitz |first1=Max |last2=Whiton |first2=Kaitlyn |last3=Albert |first3=Steven M. |last4=Alessi |first4=Cathy |last5=Bruni |first5=Oliviero |last6=DonCarlos |first6=Lydia |last7=Hazen |first7=Nancy |last8=Herman |first8=John |last9=Katz |first9=Eliot S. |last10=Kheirandish-Gozal |first10=Leila |last11=Neubauer |first11=David N. |last12=O’Donnell |first12=Anne E. |last13=Ohayon |first13=Maurice |last14=Peever |first14=John |last15=Rawding |first15=Robert |last16=Sachdeva |first16=Ramesh C. |last17=Setters |first17=Belinda |last18=Vitiello |first18=Michael V. |last19=Ware |first19=J. Catesby |last20=Adams Hillard |first20=Paula J. |title=National Sleep Foundation's sleep time duration recommendations: methodology and results summary |journal=Sleep Health |date=March 2015 |volume=1 |issue=1 |pages=40–43 |doi=10.1016/j.sleh.2014.12.010 }}</ref><ref>{{cite web | vauthors = Suni E, Dimitriu A | date = 25 July 2023 | title = Sleep Deprivation: Understanding the Hidden Consequences | url = https://www.sleepfoundation.org/sleep-deprivation | work = SleepFoundation.org }}</ref> Acute sleep deprivation occurs when a person sleeps less than usual or does not sleep at all for a short period, typically lasting one to two days. However, if the sleepless pattern persists without external factors, it may lead to chronic sleep issues. Chronic sleep deprivation occurs when a person routinely sleeps less than the amount required for proper functioning. The amount of sleep needed can depend on sleep quality, age, pregnancy, and level of sleep deprivation. Sleep deprivation is linked to various adverse health outcomes, including cognitive impairments, mood disturbances, and increased risk for chronic conditions. A meta-analysis published in Sleep Medicine Reviews indicates that individuals who experience chronic sleep deprivation are at a higher risk for developing conditions such as obesity, diabetes, and cardiovascular diseases.{{fact|date=October 2024}}
==Physiological effects==
Generally, lack of sleep may result in<ref name="SleepDep">{{cite journal | first = | last = | | title =http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Sleep_deprivation?OpenDocument | year = }}</ref><ref name="SleepDep2">{{cite journal | first = | last = | | title = http://www.apa.org/ed/topss/bryanread.html| year = }}</ref><ref name="SleepDepLuc">{{cite journal | first = | last = | | title = http://www.lucidnet.co.uk/sleep/disorders/deprivation.htm| year = }}</ref><ref name="SleepDep4">{{cite journal | first = | last = | | title = http://www.postgradmed.com/issues/2002/10_02/pn_sleep.htm| year = }}</ref><ref name="SleepDep8">{{cite journal | first = | last = | | title = http://www.vineland.org/mennies/sleep_trouble_in_school.htm| year = }}</ref><ref name="SleepDepHarvard">{{cite journal | first = | last = | | title = http://www.health.harvard.edu/press_releases/sleep_deprivation_problem.htm| year = }}</ref><ref name="SleepDepJiskha">{{cite journal | first = | last = | | title = http://www.jiskha.com/health/social_health/sleep_deprivation.html| year = }}</ref><ref name="Fiedu">{{cite journal | first = | last = | | title = http://www.fi.edu/brain/sleep.htm| year = }}</ref>:


Insufficient sleep has been linked to weight gain, high blood pressure, diabetes, depression, heart disease, and strokes.<ref>{{cite web | vauthors = Olson E |title=How many hours of sleep are enough for good health? |url=https://www.mayoclinic.org/healthy-lifestyle/adult-health/expert-answers/how-many-hours-of-sleep-are-enough/faq-20057898 |website=Mayo Clinic |publisher=Simon & Schuster |access-date=7 March 2022}}</ref> Sleep deprivation can also lead to high anxiety, irritability, erratic behavior, poor cognitive functioning and performance, and psychotic episodes.<ref>{{Cite web |title=How poor sleep affects your mental health |url=http://www.priorygroup.com/blog/how-poor-sleep-affects-your-mental-health |access-date=2022-04-17 | work = Priory |date=3 July 2018 |language=en}}</ref> A chronic sleep-restricted state adversely [[Effects of sleep deprivation on cognitive performance|affects the brain and cognitive function]].<ref name="Alhola">{{cite journal | vauthors = Alhola P, Polo-Kantola P | title = Sleep deprivation: Impact on cognitive performance | journal = Neuropsychiatric Disease and Treatment | volume = 3 | issue = 5 | pages = 553–567 | date = October 2007 | pmid = 19300585 | pmc = 2656292 | quote = Although both conditions [total and partial SD] induce several negative effects including impairments in cognitive performance, the underlying mechanisms seem to be somewhat different. }}</ref> However, in a subset of cases, sleep deprivation can paradoxically lead to increased energy and alertness; although its long-term consequences have never been evaluated, sleep deprivation has even been used as a [[#Treating depression|treatment for depression]].<ref name="REM deprivation in healthy people">{{cite journal | vauthors = Nykamp K, Rosenthal L, Folkerts M, Roehrs T, Guido P, Roth T | title = The effects of REM sleep deprivation on the level of sleepiness/alertness | journal = Sleep | volume = 21 | issue = 6 | pages = 609–614 | date = September 1998 | pmid = 9779520 | doi = 10.1093/sleep/21.6.609 | doi-access = free }}</ref><ref name="Sleep and depression review">{{cite journal | vauthors = Riemann D, Berger M, Voderholzer U | title = Sleep and depression--results from psychobiological studies: an overview | journal = Biological Psychology | volume = 57 | issue = 1–3 | pages = 67–103 | date = July–August 2001 | pmid = 11454435 | doi = 10.1016/s0301-0511(01)00090-4 }}</ref>
<div style="column-count:2; column-width:10em; -moz-column-count:2; -moz-column-width:10em;">
* aching muscles;
* blurred [[Visual perception|vision]];
* [[clinical depression]];
* [[colorblindness]];
* daytime drowsiness and naps;
* decreased mental activity and [[concentration]];
* [[depersonalization]]/[[derealization]];
* weakened [[immune system]];
* [[dizziness]];
* [[Eye circles|dark circles]] under the [[eyes]];
* [[fainting]];
* general [[mental confusion|confusion]];
* [[hallucinations]] (visual and auditory);
* hand [[tremors]];
* [[headache]];
* [[hernia]];
* [[hyperactivity]];
* [[hypertension]];
* [[impatience]];
* [[irritability]];
* [[lucid dreaming]] (once sleep resumes);
* [[memory]] lapses or loss;
* [[nausea]];
* [[nystagmus]] (rapid involuntary rhythmic eye movement);
* [[psychosis]];
* [[pallor]];
* slowed reaction time;
* slurred and/or nonsensical [[Manner of articulation|speech]];
* weight [[weight loss|loss]] or [[weight gain|gain]];
* severe [[yawn]]ing;
* symptoms similar to:
** [[Attention Deficit Hyperactivity Disorder|Attention-deficit Hyperactivity Disorder]];
** alcoholic [[drunkenness|intoxication]].
</div>


To date, most sleep deprivation studies have focused on acute sleep deprivation, suggesting that acute sleep deprivation can cause significant damage to cognitive, emotional, and physical functions and brain mechanisms.<ref>{{Cite journal | vauthors = Mai Z, Xu H, Ma N | title = Research progress on the impact of acute sleep deprivation on cognitive and emotional functions and its neural mechanisms. | journal = Chinese General Medicine | date = October 2021 | volume = 24 | issue = 29 | pages = 3653–3659 | doi=10.12114/j.issn.1007-9572.2021.01.016 | language = zh }}</ref> Few studies have compared the effects of acute total sleep deprivation and chronic partial sleep restriction.<ref name="Alhola"/> A complete absence of sleep over a long period is not frequent in humans (unless they have [[fatal insomnia]] or specific issues caused by surgery); it appears that brief [[microsleep]]s cannot be avoided.<ref>{{cite book |title=Sleep deprivation |url= https://books.google.com/books?id=EaGWMXsR5XYC&pg=PA183 | vauthors = Kushida CA |publisher=Informa Health Care |year=2005 |pages=1–2 |isbn=978-0-8247-5949-0}}</ref> Long-term total sleep deprivation has caused death in lab animals.<ref>{{cite journal | vauthors = Rechtschaffen A, Bergmann BM | title = Sleep deprivation in the rat by the disk-over-water method | journal = Behavioural Brain Research | volume = 69 | issue = 1–2 | pages = 55–63 | year = 1995 | pmid = 7546318 | doi = 10.1016/0166-4328(95)00020-T }}</ref>
===Diabetes===
A 1996 study by the [[University of Chicago]] Medical Center showed that sleep deprivation severely affects the human body's ability to metabolize [[glucose]], which can lead to early-stage [[Diabetes|Diabetes Type 2]].<ref name="DGottlieb">{{cite journal | first = | last = | title =Daniel J. Gottlieb, et al. ''Association of Sleep Time With Diabetes Mellitus and Impaired Glucose Tolerance.'' Arch Intern Med. Vol. 165 No. 8 2005; 165: 863-867 PMID 15851636. | year = }}</ref>


== Terminology==
===Effects on the brain===
===Sleep deprivation vs sleep restriction ===
Sleep deprivation can adversely affect brain function.<ref name="Fiedu">{{cite journal | first = | last = | title = http://www.fi.edu/brain/sleep.htm| year = }}</ref> A 2000 study, by the [[UCSD]] School of Medicine and the Veterans Affairs Healthcare System in San Diego, used [[functional magnetic resonance imaging]] technology to monitor activity in the brains of sleep-deprived subjects performing simple verbal learning tasks.<ref name="BrainStudy">{{cite journal | first = | last = | title = http://health.ucsd.edu/news/2000_02_09_Sleep.html| year = }}</ref> The study showed that regions of the brain's [[prefrontal cortex]] displayed more activity in sleepier subjects. Depending on the task at hand, the brain would sometimes attempt to compensate for the adverse effects caused by lack of sleep. The [[temporal lobe]], which is a brain region involved in language processing, was activated during verbal learning in rested subjects but not in sleep deprived subjects. The [[parietal lobe]], not activated in rested subjects during the verbal exercise, was more active when the subjects were deprived of sleep. Although memory performance was less efficient with sleep deprivation, greater activity in the parietal region was associated with better memory.
Reviews differentiate between having no sleep over a short-term period, such as one night ('sleep deprivation'), and having less than required sleep over a longer period ('sleep restriction'). Sleep deprivation was seen as more impactful in the short term, but sleep restriction had similar effects over a longer period.<ref>{{Cite journal|title=Predicting and mitigating fatigue effects due to sleep deprivation: A review - PMC|date=2022 |pmc=9389006 |journal=Frontiers in Neuroscience |volume=16 |doi=10.3389/fnins.2022.930280 |doi-access=free |pmid=35992930 | vauthors = Kayser KC, Puig VA, Estepp JR }}</ref><ref>{{Cite web|url=https://sleepeducation.org/the-effects-of-sleep-deprivation-vs-sleep-restriction/|title=The effects of sleep deprivation vs. sleep restriction|first=Jonathan|last=Paprocki|date=17 July 2012|website=Sleep Education}}</ref><ref>{{cite book |doi=10.1016/B978-0-444-53702-7.00006-3 |title=Total sleep deprivation, chronic sleep restriction and sleep disruption |series=Progress in Brain Research |date=2010 |volume=185 |pages=91–103 |pmid=21075235 |isbn=978-0-444-53702-7 | vauthors = Reynolds AC, Banks S }}</ref><ref>{{Cite journal|title=Impaired Vigilant Attention Partly Accounts for Inhibition Control Deficits After Total Sleep Deprivation and Partial Sleep Restriction|first1=Tianxin|last1=Mao|first2=David|last2=Dinges|first3=Yao|last3=Deng|first4=Ke|last4=Zhao|first5=Zijing|last5=Yang|first6=Hui|last6=Lei|first7=Zhuo|last7=Fang|first8=Fan Nils|last8=Yang|first9=Olga|last9=Galli|first10=Namni|last10=Goel|first11=Mathias|last11=Basner|first12=Hengyi|last12=Rao|date=16 September 2021|journal=Nature and Science of Sleep|volume=13|pages=1545–1560|doi=10.2147/NSS.S314769|doi-access=free |pmid=34557048 |pmc=8455079 }}</ref><ref>{{cite journal |last1=Banks |first1=Siobhan |last2=Dinges |first2=David F. |title=Behavioral and Physiological Consequences of Sleep Restriction |journal=Journal of Clinical Sleep Medicine |date=15 August 2007 |volume=03 |issue=5 |pages=519–528 |doi=10.5664/jcsm.26918 }}</ref> A 2022 study found that in most cases the changes induced by chronic or acute sleep loss waxed or waned across the waking day.<ref>{{Cite journal|title=Contrasting Effects of Sleep Restriction, Total Sleep Deprivation, and Sleep Timing on Positive and Negative Affect - PMC|date=2022 |pmc=9433122 |journal=Frontiers in Behavioral Neuroscience |volume=16 |doi=10.3389/fnbeh.2022.911994 |doi-access=free |pmid=36062257 | vauthors = Groeger JA, Lo JC, Santhi N, Lazar AS, Dijk DJ }}</ref>


===Sleep debt===
A 2001 study at Chicago Medical Institute suggested that sleep deprivation may be linked to more serious diseases, such as heart disease and mental illnesses, such as psychosis and bipolar disorder. A 2003 Universtity of California study found that [[REM sleep]] deprivation alleviates [[clinical depression]]. Although the mechanism is unclear it is suggested that the deprivation mimics the effects of [[selective serotonin reuptake inhibitor]]s (SSRI) however the study also indicated that REM sleep was essential for blocking [[neurotransmitter]]s and allowing the neurotransmitter receptors to "rest" and regain sensitivity which in turn leads to improved regulation of mood and increased learning ability. Non REM sleep may allow enzymes to repair brain cell damage caused by [[Radical (chemistry)|free radicals]]. High metabolic activity while awake damages the enzymes themselves preventing efficient repair. The study observed the first evidence of brain damage in Rats as a direct result of sleep deprivation.<ref name="Siegel">{{cite news
[[Sleep debt]] refers to a build up of lost optimum sleep. Sleep deprivation is known to be cumulative.<ref>{{cite web |title=Sleep Deprivation and Deficiency - How Much Sleep Is Enough |url=https://www.nhlbi.nih.gov/health/sleep-deprivation/how-much-sleep |website=National Heart, Lung, and Blood Institute |date=24 March 2022 }}</ref> This means that the fatigue and sleep one lost as a result of, for example, staying awake all night, would be carried over to the following day.<ref>{{Cite web |date=2010-01-20 |title=Sleep Debt: Can You Catch up on Sleep? |url=https://www.sleepfoundation.org/how-sleep-works/sleep-debt-and-catch-up-sleep |access-date=2022-06-27 |website=Sleep Foundation |language=en}}</ref><ref>{{cite book |last1=Colten |first1=Harvey R. |last2=Altevogt |first2=Bruce M. |last3=Research |first3=Institute of Medicine (US) Committee on Sleep Medicine and |title=Sleep Disorders and Sleep Deprivation: An Unmet Public Health Problem |date=2006 |publisher=National Academies Press (US) |chapter-url=https://www.ncbi.nlm.nih.gov/books/NBK19961/ |chapter=Extent and Health Consequences of Chronic Sleep Loss and Sleep Disorders }}</ref><ref>{{Cite web|url=https://www.sleepfoundation.org/how-sleep-works/sleep-debt-and-catch-up-sleep|title=Sleep Debt: The Hidden Cost of Insufficient Rest|date=20 January 2010|website=Sleep Foundation}}</ref> Not getting enough sleep for a couple of days cumulatively builds up a deficiency and causes symptoms of sleep deprivation to appear. A well-rested and healthy individual will generally spend less time in the [[Rapid eye movement sleep|REM stage]] of sleep. Studies have shown an inverse relationship between time spent in the REM stage of sleep and subsequent wakefulness during waking hours.<ref>{{Cite book| vauthors = Plaford GR |title=Sleep and learning : the magic that makes us healthy and smart|year=2009|isbn=978-1-60709-091-5|location=Lanham | publisher = Rowman & Littlefield Education |oclc=310224798}}</ref> Short-term insomnia [[Psychological stress and sleep|can be induced by stress]] or when the body experiences changes in environment and regimen.<ref>{{cite web |title=Insomnia - What Is Insomnia? |url=https://www.nhlbi.nih.gov/health/insomnia |website=National Heart, Lung, and Blood Institute |date=24 March 2022 }}</ref>
| first = Jerome M.
| last = Siegel
| coauthors =
| title = Why We Sleep
| url =
| work = [[Scientific American]]
| date = November, 2003
| accessdate = 2008-04-03
}}</ref>
Animal studies suggest that sleep deprivation increases stress hormones, which may reduce new cell production in adult brains.<ref>[http://news.bbc.co.uk/2/hi/health/6347043.stm http://news.bbc.co.uk/2/hi/health/6347043.stm]</ref>


===Effects on growth===
===Insomnia===
[[Insomnia]] is a sleep disorder where people have difficulty falling asleep, or staying asleep for as long as desired.<ref name="NIH2011Ov">{{cite web |date=24 March 2022 |title=What Is Insomnia? |url=https://www.nhlbi.nih.gov/health/health-topics/topics/inso |url-status=live |archive-url=https://web.archive.org/web/20160728012148/http://www.nhlbi.nih.gov/health/health-topics/topics/inso |archive-date=28 July 2016 |access-date=26 November 2023 |website=Health Topics |publisher=[[NHLBI]]}}</ref><ref>{{Cite web |date=2020-07-16 |title=Insomnia: Causes, symptoms, and treatments |url=https://www.medicalnewstoday.com/articles/9155 |access-date=2024-07-25 |website=www.medicalnewstoday.com |language=en}}</ref><ref name="Th2007">{{cite journal |vauthors=Roth T |date=August 2007 |title=Insomnia: definition, prevalence, etiology, and consequences |journal=[[Journal of Clinical Sleep Medicine]] |type=Supplement |volume=3 |issue=5 Suppl |pages=S7–10 |doi=10.5664/jcsm.26929 |pmc=1978319 |pmid=17824495 |doi-access=free}}</ref><ref name="Pun2012">{{cite journal |vauthors=Punnoose AR, Golub RM, Burke AE |date=June 2012 |title=Insomnia |journal=[[JAMA]] |type=JAMA patient page |volume=307 |issue=24 |pages=2653 |doi=10.1001/jama.2012.6219 |pmid=22735439 |doi-access=free}}</ref> Insomnia may be a factor in causing sleep deprivation.


==Effects and consequences==
A [[1999]] study<ref name="BlockQuote">Alexandros N. Vgontzas, George Mastorakos, Edward O. Bixler, Anthony Kales, Philip W. Gold & George P. Chrousos, published in Clinical Endocrinology, Volume 51 Issue 2 Page 205, August 1999</ref> found that sleep deprivation resulted in reduced cortisol secretion the next day, driven by increased subsequent slow-wave sleep. Sleep deprivation was found to enhance activity on the Hypothalamic-pituitary-adrenal axis (which controls reactions to stress and regulates body functions such as digestion, the immune system, mood, sex, or energy usage) while suppressing growth hormones. The results supported previous studies, which observed adrenal insufficiency in idiopathic hypersomnia.
[[File:Effects of sleep deprivation.svg|thumb|300px|Main health effects of sleep deprivation]]


===Introduction and overview===
===Effects on the healing process===
Effects of sleep deprivation can include
A study conducted in 2005 showed that a group of rats who were deprived of five days of sleep had no significant effect on their ability to heal wounds, compared to a group of rats not deprived of sleep.<ref>{{cite journal | title = Effects of sleep deprivation on wound healing | journal = Journal of Sleep Research | volume = 14 | issue = 3 |date=September 2005 | url = http://www.blackwell-synergy.com/doi/full/10.1111/j.1365-2869.2005.00455.x | author = Mostaghimi, L. | pages = 213 | doi = 10.1111/j.1365-2869.2005.00455.x <!--Retrieved from URL by DOI bot-->}}</ref>
* reduced ability to put an emotional event in perspective
* inattentiveness (including reduced driving ability)
* reduced working memory
* mood effects
* feeling older
* microsleeps.<ref>See sections below for refs</ref>


===Impairment of ability===
===Negative effects===
====Brain====
According to a 2000 study published in the [[British Medical Journal]], researchers in Australia and New Zealand reported that sleep deprivation can have some of the same hazardous effects as being drunk.<ref name="Drunkhazard">{{cite journal | first = | last = | | title = http://oem.bmjjournals.com/cgi/content/abstract/57/10/649| year = }}</ref> People who drove after being awake for 17&ndash;19 hours performed worse than those with a blood alcohol level of .05 percent, which is the legal limit for drunk driving in most western European countries (the U.S. and UK set their [[blood alcohol limit]]s at .08 percent). In addition, as a result of continuous muscular activity without proper rest time, effects such as cramping are much more frequent in sleep-deprived individuals. Extreme cases of sleep deprivation have been reported to be associated with hernias, muscle fascia tears, and other such problems commonly associated with physical overexertion. Beyond impaired motor skills, people who get too little sleep may have higher levels of stress, anxiety and depression, and may take unnecessary risks. According to the National Highway Traffic Safety Administration, over 100,000 traffic accidents each year in the USA alone are caused by fatigue and drowsiness.<ref name="SleepDepReport">{{cite journal | author = Siri Carpenter | title = Sleep deprivation may be undermining teen health | url = http://www.apa.org/monitor/oct01/sleepteen.html | volume = 32 | issue = 9 | year = 2001}}</ref><ref name="HolyName">{{cite journal | first = | last = | | title = http://www.holyname.org/healthcare/excellence/njnsleep/sleep_deprivation.htm| year = }}</ref> A new study has shown that while total sleep deprivation for one night caused many errors, the errors were not significant until after the second night of total sleep deprivation.<ref>{{cite journal | title = Effects of two nights sleep deprivation and two nights recovery sleep on response inhibition | journal = [[Journal of Sleep Research]] | volume = 15 | issue = 3 |date=September 2006 | doi = 10.1111/j.1365-2869.2006.00535.x | author = Drummond, SEAN P. A. | pages = 261}}</ref>


===== Temporary =====
The response latency seem to be higher when it comes to actions regarding personal morality rather than in situations when morality is not in question. The willingness to violate a personal belief has been shown to be moderated by [[emotional intelligence|EQ]], so people with high EQ are affected less by sleep deprivation in such situations.<ref>{{cite journal | title = The Effects of 53 Hours of Sleep Deprivation on Moral Judgment | journal = Journal SLEEP | volume = 30 | issue = 3 | url=http://www.journalsleep.org/ViewAbstract.aspx?citationid=3172}}</ref>
One study suggested, based on neuroimaging, that 35 hours of total sleep deprivation in healthy controls negatively affected the brain's ability to put an emotional event into the proper perspective and make a controlled, suitable response to the event.<ref>{{cite journal | vauthors = Yoo SS, Gujar N, Hu P, Jolesz FA, Walker MP | title = The human emotional brain without sleep--a prefrontal amygdala disconnect | journal = Current Biology | volume = 17 | issue = 20 | pages = R877–R878 | date = October 2007 | pmid = 17956744 | doi = 10.1016/j.cub.2007.08.007 | doi-access = free | bibcode = 2007CBio...17.R877Y }}</ref>


According to the latest research, lack of sleep may cause more harm than previously thought and may lead to the permanent loss of brain cells.<ref>{{Cite web |date=2014-03-21 |title=最新研究:睡眠不足会永久损伤脑细胞 | trans-title = Latest research: Lack of sleep can permanently damage brain cells |url=https://www.bbc.com/zhongwen/simp/science/2014/03/140321_lost_sleep |access-date=2023-12-05 |website=BBC News 中文 (Chinese) |language=zh-hans}}</ref> The negative effects of sleep deprivation on alertness and cognitive performance suggest decreases in brain activity and function. These changes primarily occur in two regions: the [[thalamus]], a structure involved in alertness and attention, and the [[prefrontal cortex]], a region subserving alertness, attention, and higher-order cognitive processes.<ref name="performance" /> Interestingly, the effects of sleep deprivation appear to be constant across "night owls" and "early birds", or different sleep chronotypes, as revealed by [[fMRI]] and [[graph theory]].<ref>{{cite journal | vauthors = Farahani FV, Fafrowicz M, Karwowski W, Douglas PK, Domagalik A, Beldzik E, Oginska H, Marek T | title = Effects of Chronic Sleep Restriction on the Brain Functional Network, as Revealed by Graph Theory | journal = Frontiers in Neuroscience | volume = 13 | pages = 1087 | date = 11 October 2019 | pmid = 31680823 | pmc = 6807652 | doi = 10.3389/fnins.2019.01087 | publisher = Frontiers Media SA | doi-access = free }}</ref>
===Obesity===

Several large studies using nationally representative samples suggest that the [[obesity]] problem in Europe and the United States might have as one of its causes a corresponding decrease in the average number of hours that people are sleeping.<ref name=Bristol>[http://www.bris.ac.uk/news/2004/582 Does the lack of sleep make you fat?], Bristol University Press Release, [[December 7]] [[2004]]</ref><ref name=Hasler>[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?itool=abstractplus&db=pubmed&cmd=Retrieve&dopt=abstractplus&list_uids=15283000 The association between short sleep duration and obesity in young adults: a 13-year prospective study.], Sleep, [[Jun 15;27(4):661-6]] [[2004]]</ref><ref name=Gangwisch>[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16295214&query_hl=2&itool=pubmed_XML Inadequate sleep as a risk factor for obesity: analyses of the NHANES I], [[Oct 1;28(10):1289-96]] [[2005]]</ref> The findings suggest that this might be happening because sleep deprivation could be disrupting hormones that regulate glucose metabolism and appetite.<ref name=VanCauter>[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=10681902&query_hl=10&itool=pubmed_docsum Sleep as a mediator of the relationship between socioeconomic status and health: a hypothesis], Ann N Y Acad Sci., [[896:254-61]] [[1999]]</ref> The association between sleep deprivation and obesity appears to be strongest in young and middle-age adults. Other scientists hold that the physical discomfort of obesity and related problems, such as [[sleep apnea]], reduce an individual's chances of getting a good night's sleep.
===== Lasting =====
[[File:Effect of REM sleep deprivation on the mitochondrial structure of neurons in rats.jpg|thumb|REM sleep deprivation causes swollen mitochondria in neurons (caused by [[cytochrome c]]); noradrenaline receptor blockers keep their inner cristae intact.]]
Studies on rodents show that the response to neuronal injury due to acute sleep deprivation is adaptative before three hours of sleep loss per night and becomes maladaptative, and [[apoptosis]] occurs after.<ref>{{cite journal | vauthors = Wu J, Dou Y, Ladiges WC | title = Adverse Neurological Effects of Short-Term Sleep Deprivation in Aging Mice Are Prevented by SS31 Peptide | journal = Clocks & Sleep | volume = 2 | issue = 3 | pages = 325–333 | date = September 2020 | pmid = 33089207 | pmc = 7573804 | doi = 10.3390/clockssleep2030024 | doi-access = free }}</ref> Studies in mice show neuronal death (in the [[hippocampus]], [[locus coeruleus]], and medial [[Prefrontal cortex|PFC]]) occurs after two days of [[Rapid eye movement sleep|REM sleep]] deprivation. However, mice do not model the effects in humans well since they sleep a third of the duration of REM sleep of humans and [[Caspase 3|caspase-3]], the main effector of apoptosis, kills three times the number of cells in humans than in mice.<ref>{{cite journal | vauthors = Kerr LE, McGregor AL, Amet LE, Asada T, Spratt C, Allsopp TE, Harmar AJ, Shen S, Carlson G, Logan N, Kelly JS, Sharkey J | title = Mice overexpressing human caspase 3 appear phenotypically normal but exhibit increased apoptosis and larger lesion volumes in response to transient focal cerebral ischaemia | journal = Cell Death and Differentiation | volume = 11 | issue = 10 | pages = 1102–1111 | date = October 2004 | pmid = 15153940 | doi = 10.1038/sj.cdd.4401449 | doi-access = free }}</ref> Also not accounted for in nearly all of the studies is that acute REM sleep deprivation induces lasting (> 20 days) neuronal apoptosis in mice, and the apoptosis rate increases on the day following its end, so the amount of apoptosis is often undercounted in mice because experiments nearly always measure it the day the sleep deprivation ends.<ref>{{cite journal | vauthors = Soto-Rodriguez S, Lopez-Armas G, Luquin S, Ramos-Zuñiga R, Jauregui-Huerta F, Gonzalez-Perez O, Gonzalez-Castañeda RE | title = Rapid Eye Movement Sleep Deprivation Produces Long-Term Detrimental Effects in Spatial Memory and Modifies the Cellular Composition of the Subgranular Zone | journal = Frontiers in Cellular Neuroscience | volume = 10 | pages = 132 | year = 2016 | pmid = 27303266 | pmc = 4884737 | doi = 10.3389/fncel.2016.00132 | doi-access = free }}</ref> For these reasons, both the time before cells degenerate and the extent of degeneration could be greatly underevaluated in humans.

Such [[Histology|histological]] studies cannot be performed on humans for ethical reasons, but long-term studies show that sleep quality is more associated with [[gray matter]] volume reduction<ref>{{Cite web | vauthors = Haelle T | date = 3 September 2014 |title=Poor Quality Sleep May Be Linked to Shrinking Brain |url=https://www.webmd.com/sleep-disorders/news/20140903/poor-quality-sleep-may-be-linked-to-shrinking-brain | archive-url = https://web.archive.org/web/20230309202947/https://www.webmd.com/web/20230309202947/https:/www.webmd.com/sleep-disorders/news/20140903/poor-quality-sleep-may-be-linked-to-shrinking-brain | archive-date = 9 March 2023 |access-date=9 March 2023|website=WebMD |language=en}}</ref> than age,<ref>{{cite journal | vauthors = Van Someren EJ, Oosterman JM, Van Harten B, Vogels RL, Gouw AA, Weinstein HC, Poggesi A, Scheltens P, Scherder EJ | title = Medial temporal lobe atrophy relates more strongly to sleep-wake rhythm fragmentation than to age or any other known risk | journal = Neurobiology of Learning and Memory | volume = 160 | pages = 132–138 | date = April 2019 | pmid = 29864525 | doi = 10.1016/j.nlm.2018.05.017 | series = Sleep and Hippocampal Function | doi-access = free | hdl = 2066/202856 | hdl-access = free }}</ref> occurring in areas like the [[precuneus]].<ref>{{cite journal | vauthors = Grau-Rivera O, Operto G, Falcón C, Sánchez-Benavides G, Cacciaglia R, Brugulat-Serrat A, Gramunt N, Salvadó G, Suárez-Calvet M, Minguillon C, Iranzo Á, Gispert JD, Molinuevo JL | title = Association between insomnia and cognitive performance, gray matter volume, and white matter microstructure in cognitively unimpaired adults | journal = Alzheimer's Research & Therapy | volume = 12 | issue = 1 | pages = 4 | date = January 2020 | pmid = 31907066 | pmc = 6945611 | doi = 10.1186/s13195-019-0547-3 | collaboration = ALFA Study | doi-access = free }}</ref>
[[File:Molecular pathway of REMSD-induced apoptosis in neurons.jpg|left|thumb|Molecular pathway of REM sleep deprivation-induced apoptosis in neurons]]
Sleep is necessary to repair cellular damage caused by [[reactive oxygen species]] and DNA damage. During long-term sleep deprivation, cellular damage aggregates up to a tipping point that triggers cellular degeneration and apoptosis.
REM sleep deprivation causes an increase in [[Norepinephrine|noradrenaline]] (which incidentally causes the person sleep deprived to be stressed) due to the neurons in the [[locus coeruleus]] producing it not ceasing to do so, which causes an increase in the activity of the [[Sodium–potassium pump|Na⁺/K⁺-ATPase pump]], which itself activates the [[Apoptosis#Intrinsic pathway|intrinsic pathway of apoptosis]]<ref>{{cite journal | vauthors = Somarajan BI, Khanday MA, Mallick BN | title = Rapid Eye Movement Sleep Deprivation Induces Neuronal Apoptosis by Noradrenaline Acting on Alpha1 Adrenoceptor and by Triggering Mitochondrial Intrinsic Pathway | journal = Frontiers in Neurology | volume = 7 | pages = 25 | date = 2016 | pmid = 27014180 | pmc = 4779900 | doi = 10.3389/fneur.2016.00025 | doi-access = free }}</ref> and prevents autophagy, which also induces the mitochondrial pathway of apoptosis.

Sleep outside of the REM phase may allow enzymes to repair brain cell damage caused by [[radical (chemistry)|free radicals]]. High metabolic activity while awake damages the enzymes themselves, preventing efficient repair. This study observed the first evidence of brain damage in rats as a direct result of sleep deprivation.<ref name="Siegel">{{cite news | vauthors = Siegel JM |title=Why We Sleep |url=http://www.semel.ucla.edu/sleepresearch/sciam2003/sciamsleep.pdf |work=[[Scientific American]] |date=November 2003 |access-date=3 April 2008 |url-status=live |archive-url=https://web.archive.org/web/20081203071459/http://www.semel.ucla.edu/sleepresearch/sciam2003/sciamsleep.pdf |archive-date=3 December 2008 }}</ref>

====Cognitive and neurobehavioural effects====
A 2009 review found that sleep loss had a wide range of cognitive and neurobehavioral effects including unstable attention, slowing of response times, decline of memory performance, reduced learning of cognitive tasks, deterioration of performance in tasks requiring divergent thinking, perseveration with ineffective solutions, performance deterioration as task duration increases; and growing neglect of activities judged to be nonessential.<ref>{{Cite journal|title=Neurocognitive Consequences of Sleep Deprivation - PMC|date=2009 |pmc=3564638 |journal=Seminars in Neurology |volume=29 |issue=4 |pages=320–339 |doi=10.1055/s-0029-1237117 |pmid=19742409 | vauthors = Goel N, Rao H, Durmer JS, Dinges DF }}</ref>

===== Attention =====
Attentional lapses also extend into more critical domains in which the consequences can be life or death; car crashes and industrial disasters can result from inattentiveness attributable to sleep deprivation. To empirically measure the magnitude of attention deficits, researchers typically employ the [[psychomotor vigilance task]] (PVT), which requires the subject to press a button in response to a light at random intervals. Failure to press the button in response to the stimulus (light) is recorded as an error, attributable to the microsleeps that occur as a product of sleep deprivation.<ref>{{cite journal |vauthors=Innes CR, Poudel GR, Jones RD |date=November 2013 |title=Efficient and regular patterns of nighttime sleep are related to increased vulnerability to microsleeps following a single night of sleep restriction |journal=Chronobiology International |volume=30 |issue=9 |pages=1187–1196 |doi=10.3109/07420528.2013.810222 |pmid=23998288 }}</ref>

Crucially, individuals' subjective evaluations of their fatigue often do not predict actual performance on the PVT. While totally sleep-deprived individuals are usually aware of the degree of their impairment, lapses from chronic (lesser) sleep deprivation can build up over time so that they are equal in number and severity to the lapses occurring from total (acute) sleep deprivation. Chronically sleep-deprived people, however, continue to rate themselves considerably less impaired than totally sleep-deprived participants.<ref name="SleepDepPVT">{{cite journal |last1=Van Dongen |first1=Hans P.A. |last2=Maislin |first2=Greg |last3=Mullington |first3=Janet M. |last4=Dinges |first4=David F. |title=The Cumulative Cost of Additional Wakefulness: Dose-Response Effects on Neurobehavioral Functions and Sleep Physiology From Chronic Sleep Restriction and Total Sleep Deprivation |journal=Sleep |date=March 2003 |volume=26 |issue=2 |pages=117–126 |doi=10.1093/sleep/26.2.117 |pmid=12683469 }}</ref> Since people usually evaluate their capability on tasks like driving subjectively, their evaluations may lead them to the false conclusion that they can perform tasks that require constant attention when their abilities are in fact impaired.{{cn|date=April 2023}}

===== Driving ability =====
{{main|Sleep-deprived driving}}
According to a 2000 study, sleep deprivation can have some of the same hazardous effects as being drunk.<ref name="Drunkhazard">{{cite journal |vauthors=Williamson AM, Feyer AM |date=October 2000 |title=Moderate sleep deprivation produces impairments in cognitive and motor performance equivalent to legally prescribed levels of alcohol intoxication |journal=Occupational and Environmental Medicine |volume=57 |issue=10 |pages=649–655 |doi=10.1136/oem.57.10.649 |pmc=1739867 |pmid=10984335}}</ref> People who drove after being awake for 17–19 hours performed worse than those with a blood alcohol level of 0.05 percent, which is the legal limit for drunk driving in most western European countries and Australia. Another study suggested that performance begins to degrade after 16 hours awake, and 21 hours awake was equivalent to a blood alcohol content of 0.08 percent, which is the [[blood alcohol limit]] for drunk driving in Canada, the U.S., and the U.K.<ref name="FatigueandAlcohol">{{cite journal |vauthors=Dawson D, Reid K |date=July 1997 |title=Fatigue, alcohol and performance impairment |journal=Nature |volume=388 |issue=6639 |pages=235 |bibcode=1997Natur.388..235D |doi=10.1038/40775 |pmid=9230429 |doi-access=free}}</ref>

The fatigue of drivers of goods trucks and passenger vehicles has come to the attention of authorities in many countries, where specific laws have been introduced with the aim of reducing the risk of traffic accidents due to driver fatigue. Rules concerning minimum break lengths, maximum shift lengths, and minimum time between shifts are common in the driving regulations used in different countries and regions, such as the [[drivers' working hours]] regulations in the European Union and [[hours of service]] regulations in the United States. The [[American Academy of Sleep Medicine]] (AASM) reports that one in every five serious motor vehicle injuries are related to driver fatigue.
The National Sleep Foundation identifies several warning signs that a driver is dangerously fatigued. These include rolling down the window, turning up the radio, having trouble keeping eyes open, head-nodding, drifting out of their lane, and daydreaming. At particular risk are lone drivers between midnight and 6:00 a.m.<ref name="SleepFoundationDrowsyDriving">{{cite web|date=2 December 2009|title=Drowsy Driving:Key Messages and Talking Points|url=http://www.sleepfoundation.org/sites/default/files/Drowsy%20Driving-Key%20Messages%20and%20Talking%20Points.pdf|url-status=live|archive-url=https://web.archive.org/web/20131126062848/http://www.sleepfoundation.org/sites/default/files/Drowsy%20Driving-Key%20Messages%20and%20Talking%20Points.pdf|archive-date=26 November 2013|work=National Sleep Foundation}}</ref>

Sleep deprivation can negatively impact overall performance and has led to major fatal accidents. Due largely to the February 2009 crash of [[Colgan Air Flight 3407]], which killed 50 people and was partially attributed to pilot fatigue, the FAA reviewed its procedures to ensure that pilots are sufficiently rested. Air traffic controllers were under scrutiny when, in 2010, there were 10 incidents of controllers falling asleep while on shift. The common practice of turn-around shifts caused sleep deprivation and was a contributing factor to all air traffic control incidents. The FAA reviewed its practices for shift changes, and the findings showed that controllers were not well rested.<ref name="PlaneCrash">{{cite web|date=10 September 2010|title=Fact Sheet – Pilot Fatigue|url=http://www.faa.gov/news/fact_sheets/news_story.cfm?newsId=11857|url-status=live|archive-url=https://web.archive.org/web/20161005194346/http://www.faa.gov/news/fact_sheets/news_story.cfm?newsId=11857|archive-date=5 October 2016|work=Federal Aviation Administration}}</ref> A 2004 study also found medical residents with less than four hours of sleep a night made more than twice as many errors as the 11% of surveyed residents who slept for more than seven hours a night.<ref name="MedicalErrors">{{cite journal | vauthors = Baldwin DC, Daugherty SR | title = Sleep deprivation and fatigue in residency training: results of a national survey of first- and second-year residents | journal = Sleep | volume = 27 | issue = 2 | pages = 217–223 | date = March 2004 | pmid = 15124713 | doi = 10.1093/sleep/27.2.217 | doi-access = free }}</ref>

=====Impacts on reasoning and decision-making=====
Twenty-four hours of continuous sleep deprivation results in the choice of less difficult math tasks without a decrease in subjective reports of effort applied to the task.{{Citation needed|date=June 2023}} Naturally occurring sleep loss affects the choice of everyday tasks, such that low-effort tasks are mostly commonly selected.{{Citation needed|date=June 2023}} [[Adolescents]] who experience less sleep show a decreased willingness to engage in sports activities that require effort through fine motor coordination and attention to detail.<ref>{{cite journal | vauthors = Engle-Friedman M, Riela S, Golan R, Ventuneac AM, Davis CM, Jefferson AD, Major D | title = The effect of sleep loss on next day effort | journal = Journal of Sleep Research | volume = 12 | issue = 2 | pages = 113–124 | date = June 2003 | pmid = 12753348 | doi = 10.1046/j.1365-2869.2003.00351.x }}</ref><ref>{{cite journal | vauthors = Engle-Friedman M, Palencar V, Riela S | title = Sleep and effort in adolescent athletes | journal = Journal of Child Health Care | volume = 14 | issue = 2 | pages = 131–141 | date = June 2010 | pmid = 20435615 | doi = 10.1177/1367493510362129 }}</ref>

Astronauts have reported [[Performance Errors due to Fatigue and Sleep Loss During Spaceflight|performance errors and decreased cognitive ability]] during periods of extended working hours and wakefulness, as well as sleep loss caused by circadian rhythm disruption and environmental factors.<ref>{{cite web| vauthors = Whitmire AM, Leveton LB, Barger L, Brainard G, Dinges DF, Klerman E, Shea C |title=Risk of Performance Errors due to Sleep Loss, Circadian Desynchronization, Fatigue, and Work Overload|url=http://humanresearchroadmap.nasa.gov/evidence/reports/Sleep.pdf|url-status=live|archive-url=https://web.archive.org/web/20120215234226/http://humanresearchroadmap.nasa.gov/evidence/reports/Sleep.pdf|archive-date=15 February 2012|access-date=25 June 2012|work=Human Health and Performance Risks of Space Exploration Missions: Evidence reviewed by the NASA Human Research Program}}</ref>

===== Working memory =====
Deficits in attention and [[working memory]] are one of the most important;<ref name="Alhola" /> such lapses in mundane routines can lead to unfortunate results, from forgetting ingredients while cooking to missing a sentence while taking notes. Performing tasks that require attention appears to be correlated with the number of hours of sleep received each night, declining as a function of hours of sleep deprivation.<ref>{{Cite book|title = An Introduction to Brain and Behavior| vauthors = Kolb B, Whishaw I |publisher = Worth Publishers|year = 2014|isbn = 978-1-4292-4228-8|location = New York, New York|pages = 468–469|edition = 4th}}</ref> Working memory is tested by methods such as choice-reaction time tasks.<ref name="Alhola" />

==== Mood ====
Sleep deprivation can have a negative impact on mood.<ref>{{cite journal | vauthors = Kramer M, Roehrs T, Roth T | title = Mood change and the physiology of sleep | journal = Comprehensive Psychiatry | volume = 17 | issue = 1 | pages = 161–165 | date = January 1976 | pmid = 174865 | doi = 10.1016/0010-440x(76)90065-1 }}</ref> Staying up all night or taking an unexpected night shift can make one feel irritable. Once one catches up on sleep, one's mood will often return to baseline or normal. Even partial sleep deprivation can have a significant impact on mood. In one study, subjects reported increased sleepiness, fatigue, confusion, tension, and total mood disturbance, which all recovered to their baseline after one to two full nights of sleep.<ref name=":0">{{Cite web|title=Sleep and Mood {{!}} Need Sleep|url=http://healthysleep.med.harvard.edu/need-sleep/whats-in-it-for-you/mood#1.|access-date=21 January 2021|website=healthysleep.med.harvard.edu|archive-date=21 March 2021|archive-url=https://web.archive.org/web/20210321052445/http://healthysleep.med.harvard.edu/need-sleep/whats-in-it-for-you/mood#1.|url-status=dead}}</ref><ref>{{cite journal | vauthors = Dinges DF, Pack F, Williams K, Gillen KA, Powell JW, Ott GE, Aptowicz C, Pack AI | title = Cumulative sleepiness, mood disturbance, and psychomotor vigilance performance decrements during a week of sleep restricted to 4-5 hours per night | journal = Sleep | volume = 20 | issue = 4 | pages = 267–277 | date = April 1997 | pmid = 9231952 }}</ref>

[[Depression (mood)|Depression]] and sleep are in a bidirectional relationship. Poor sleep can lead to the development of depression, and depression can cause [[insomnia]], [[hypersomnia]], or [[obstructive sleep apnea]].<ref>{{Cite web|title=Depression and Sleep|url=https://www.sleepfoundation.org/mental-health/depression-and-sleep|access-date=21 January 2021|website=Sleep Foundation |date=18 September 2020 |language=en}}</ref><ref>{{cite journal | vauthors = Franzen PL, Buysse DJ | title = Sleep disturbances and depression: risk relationships for subsequent depression and therapeutic implications | journal = Dialogues in Clinical Neuroscience | volume = 10 | issue = 4 | pages = 473–481 | date = 2008 | pmid = 19170404 | pmc = 3108260 | doi = 10.31887/DCNS.2008.10.4/plfranzen }}</ref> About 75% of adult patients with depression can present with insomnia.<ref>{{cite journal | vauthors = Nutt D, Wilson S, Paterson L | title = Sleep disorders as core symptoms of depression | journal = Dialogues in Clinical Neuroscience | volume = 10 | issue = 3 | pages = 329–336 | date = 2008 | pmid = 18979946 | pmc = 3181883 | doi = 10.31887/DCNS.2008.10.3/dnutt }}</ref> Sleep deprivation, whether total or not, can induce significant anxiety, and longer sleep deprivations tend to result in an increased level of anxiety.<ref>{{cite journal | vauthors = Pires GN, Bezerra AG, Tufik S, Andersen ML | title = Effects of acute sleep deprivation on state anxiety levels: a systematic review and meta-analysis | journal = Sleep Medicine | volume = 24 | pages = 109–118 | date = August 2016 | pmid = 27810176 | doi = 10.1016/j.sleep.2016.07.019 }}</ref>

Sleep deprivation has also shown some positive effects on mood and can be used to treat depression.<ref name="Sleep and depression review" /> Chronotype can affect how sleep deprivation influences mood. Those with morningness (advanced sleep period or "lark") preference become more depressed after sleep deprivation, while those with eveningness (delayed sleep period or "owl") preference show an improvement in mood.<ref>{{cite journal |last1=Selvi |first1=Yavuz |last2=Gulec |first2=Mustafa |last3=Agargun |first3=Mehmet Yucel |last4=Besiroglu |first4=Lutfullah |title=Mood changes after sleep deprivation in morningness–eveningness chronotypes in healthy individuals |journal=Journal of Sleep Research |date=September 2007 |volume=16 |issue=3 |pages=241–244 |doi=10.1111/j.1365-2869.2007.00596.x |pmid=17716271 }}</ref>

Mood and mental states can affect sleep as well. Increased agitation and arousal from anxiety or stress can keep one more aroused, awake, and alert.<ref name=":0" />

====Subjective age====
One study found that sleepiness increases the subjective sense one is old, with extreme sleepiness leading people to feel 10 years older.<ref name="a576">{{cite journal |last1=Balter |first1=Leonie J. T. |last2=Axelsson |first2=John |date=2024-03-27 |title=Sleep and subjective age: protect your sleep if you want to feel young |journal=Proceedings of the Royal Society B: Biological Sciences |publisher=The Royal Society |volume=291 |issue=2019 |doi=10.1098/rspb.2024.0171 |doi-access=free |pmid=38531399 |pmc=10965331 }}</ref> Other studies have also shown a correlation between relatively old subjective age and poor sleep quality.<ref>{{cite journal |last1=Stephan |first1=Yannick |last2=Sutin |first2=Angelina R. |last3=Bayard |first3=Sophie |last4=Terracciano |first4=Antonio |title=Subjective age and sleep in middle-aged and older adults |journal=Psychology & Health |date=2 September 2017 |volume=32 |issue=9 |pages=1140–1151 |doi=10.1080/08870446.2017.1324971 |pmid=28480746 }}</ref><ref>{{cite journal |last1=Yoon |first1=Jee-Eun |last2=Oh |first2=Dana |last3=Hwang |first3=Inha |last4=Park |first4=Jung Ah |last5=Im |first5=Hee-Jin |last6=Thomas |first6=Robert J. |last7=Kim |first7=Daeyoung |last8=Yang |first8=Kwang Ik |last9=Chu |first9=Min Kyung |last10=Yun |first10=Chang-Ho |title=Association between older subjective age and poor sleep quality: a population-based study |journal=Behavioral Sleep Medicine |date=3 September 2023 |volume=21 |issue=5 |pages=585–600 |doi=10.1080/15402002.2022.2144860 |pmid=36377789 }}</ref>

==== Fatigue ====
Sleep deprivation and disruption is associated with subsequent [[fatigue]].<ref>{{cite book | chapter-url=https://www.ncbi.nlm.nih.gov/books/NBK384963 | title=Commercial Motor Vehicle Driver Fatigue, Long-Term Health, and Highway Safety: Research Needs | chapter=Consequences of Fatigue from Insufficient Sleep | date=12 August 2016 | publisher=National Academies Press (US) }}</ref><ref>{{cite journal | doi=10.3389/fnins.2022.930280 | doi-access=free | title=Predicting and mitigating fatigue effects due to sleep deprivation: A review | date=2022 | last1=Kayser | first1=Kylie C. | last2=Puig | first2=Vannia A. | last3=Estepp | first3=Justin R. | journal=Frontiers in Neuroscience | volume=16 | pmid=35992930 | pmc=9389006 }}</ref> Fatigue has different effects and characteristics from sleep deprivation.

==== Sleep ====

===== Propensity =====
Sleep propensity can be defined as the readiness to transition from wakefulness to sleep or the ability to stay asleep if already sleeping.<ref>{{cite book | vauthors = Schulz H, Bes E, Jobert M | chapter = Modelling sleep propensity and sleep disturbances. | title = Sleep—Wake Disorders | date = 1998 | pages = 11–26 | location = Boston, MA | publisher = Springer US | doi = 10.1007/978-1-4899-0245-0_2 | isbn = 978-1-4899-0247-4 }}</ref> Sleep deprivation increases this propensity, which can be measured by polysomnography (PSG) as a reduction in sleep latency (the time needed to fall asleep).<ref name="Durmer2005">{{cite journal | vauthors = Durmer JS, Dinges DF | title = Neurocognitive consequences of sleep deprivation | journal = Seminars in Neurology | volume = 25 | issue = 1 | pages = 117–129 | date = March 2005 | pmid = 15798944 | pmc = 3564638 | doi = 10.1055/s-2005-867080 }}</ref> An indicator of sleep propensity can also be seen in the shortening of the transition from light stages of non-REM sleep to deeper slow-wave oscillations.<ref name="Durmer2005" />

On average, the latency in healthy adults decreases by a few minutes after a night without sleep, and the latency from sleep onset to slow-wave sleep is halved.<ref name="Durmer2005" /> Sleep latency is generally measured with the multiple sleep latency test (MSLT). In contrast, the maintenance of wakefulness test (MWT) also uses sleep latency, but this time as a measure of the capacity of the participants to stay awake (when asked to) instead of falling asleep.<ref name="Durmer2005" />

===== Impact on the sleep-wake cycle =====
Some research shows that sleep deprivation dysregulates the sleep-wake cycle.<ref name="Durmer2005" /> Multiple studies that identified the role of the [[hypothalamus]] and multiple neural systems controlling circadian rhythms and homeostasis have been helpful in understanding sleep deprivation better.<ref name="Durmer2005" /><ref>{{cite journal | vauthors = Saper CB, Chou TC, Scammell TE | title = The sleep switch: hypothalamic control of sleep and wakefulness | journal = Trends in Neurosciences | volume = 24 | issue = 12 | pages = 726–731 | date = December 2001 | pmid = 11718878 | doi = 10.1016/S0166-2236(00)02002-6 }}</ref>

To describe the temporal course of the sleep-wake cycle, a two-process model of sleep regulation can be mentioned.<ref name="Durmer2005" /> This model proposes a homeostatic process (Process S) and a circadian process (Process C) that interact to define the time and intensity of sleep.<ref name="Borbély2016">{{cite journal | vauthors = Borbély AA, Daan S, Wirz-Justice A, Deboer T | title = The two-process model of sleep regulation: a reappraisal | journal = Journal of Sleep Research | volume = 25 | issue = 2 | pages = 131–143 | date = April 2016 | pmid = 26762182 | doi = 10.1111/jsr.12371 | doi-access = free }}</ref> Process S represents the drive for sleep, increasing during wakefulness and decreasing during sleep until a defined threshold level, while Process C is the oscillator responsible for these levels. When being sleep deprived, homeostatic pressure accumulates to the point that waking functions will be degraded even at the highest circadian drive for wakefulness.<ref name="Durmer2005" /><ref name="Borbély2016" />

===== Microsleeps =====
[[Microsleep]]s are periods of brief sleep that most frequently occur when a person has a significant level of sleep deprivation.<ref>{{cite web | url=https://health.clevelandclinic.org/what-you-should-know-about-microsleep | title=What You Should Know About Microsleep }}</ref> Microsleeps usually last for a few seconds, usually no longer than 15 seconds,<ref>{{cite journal | vauthors = Skorucak J, Hertig-Godeschalk A, Schreier DR, Malafeev A, Mathis J, Achermann P | title = Automatic detection of microsleep episodes with feature-based machine learning | journal = Sleep | volume = 43 | issue = 1 | pages = zsz225 | date = January 2020 | pmid = 31559424 | doi = 10.1093/sleep/zsz225 | doi-access = free | hdl = 20.500.11850/391781 | hdl-access = free }}</ref> and happen most frequently when a person is trying to stay awake when they are feeling sleepy.<ref>{{Cite web|url = http://healthysleep.med.harvard.edu/need-sleep/glossary/k-m|title = Glossary K-M|date = 2012|website = Get Sleep|publisher = Harvard Medical School|url-status = live|archive-url = https://web.archive.org/web/20150402122751/http://healthysleep.med.harvard.edu/need-sleep/glossary/k-m|archive-date = 2 April 2015|df = dmy-all}}</ref> The person usually falls into microsleep while doing a monotonous task like driving, reading a book, or staring at a [[computer]].<ref>{{Cite web|title = Microsleep {{!}} Microsleeps|url = http://www.sleepdex.org/microsleep.htm|website = www.sleepdex.org|access-date = 14 February 2016|url-status = live|archive-url = https://web.archive.org/web/20160303102646/http://www.sleepdex.org/microsleep.htm|archive-date = 3 March 2016|df = dmy-all}}</ref> Microsleeps are similar to [[syncope (medicine)|blackouts]], and a person experiencing them is not consciously aware that they are occurring.

An even lighter type of sleep has been seen in rats that have been kept awake for long periods of time. In a process known as [[local sleep]], specific localized brain regions went into periods of short (~80 ms) but frequent (~40/min) NREM-like states. Despite the on-and-off periods where neurons shut off, the rats appeared to be awake, although they performed poorly at tests.<ref>{{cite journal | vauthors = Vyazovskiy VV, Olcese U, Hanlon EC, Nir Y, Cirelli C, Tononi G | title = Local sleep in awake rats | journal = Nature | volume = 472 | issue = 7344 | pages = 443–447 | date = April 2011 | pmid = 21525926 | pmc = 3085007 | doi = 10.1038/nature10009 | bibcode = 2011Natur.472..443V }}</ref>

==== Cardiovascular morbidity ====
Decreased sleep duration is associated with many adverse cardiovascular consequences.<ref>{{Cite web|date=13 February 2019|title=CDC - Sleep and Chronic Disease - Sleep and Sleep Disorders|url=https://www.cdc.gov/sleep/about_sleep/chronic_disease.html|access-date=21 January 2021|website=www.cdc.gov|language=en-us}}</ref><ref>{{cite journal | vauthors = Knutson KL, Van Cauter E, Rathouz PJ, Yan LL, Hulley SB, Liu K, Lauderdale DS | title = Association between sleep and blood pressure in midlife: the CARDIA sleep study | journal = Archives of Internal Medicine | volume = 169 | issue = 11 | pages = 1055–1061 | date = June 2009 | pmid = 19506175 | pmc = 2944774 | doi = 10.1001/archinternmed.2009.119 }}</ref><ref>{{cite journal | vauthors = King CR, Knutson KL, Rathouz PJ, Sidney S, Liu K, Lauderdale DS | title = Short sleep duration and incident coronary artery calcification | journal = JAMA | volume = 300 | issue = 24 | pages = 2859–2866 | date = December 2008 | pmid = 19109114 | pmc = 2661105 | doi = 10.1001/jama.2008.867 }}</ref><ref>{{cite journal | vauthors = Sabanayagam C, Shankar A | title = Sleep duration and cardiovascular disease: results from the National Health Interview Survey | journal = Sleep | volume = 33 | issue = 8 | pages = 1037–1042 | date = August 2010 | pmid = 20815184 | pmc = 2910533 | doi = 10.1093/sleep/33.8.1037 }}</ref> The [[American Heart Association]] has stated that sleep restriction is a risk factor for adverse cardiometabolic profiles and outcomes. The organization recommends healthy sleep habits for ideal cardiac health, along with other well-known factors like blood pressure, cholesterol, diet, glucose, weight, smoking, and physical activity.<ref>{{cite journal | vauthors = St-Onge MP, Grandner MA, Brown D, Conroy MB, Jean-Louis G, Coons M, Bhatt DL | title = Sleep Duration and Quality: Impact on Lifestyle Behaviors and Cardiometabolic Health: A Scientific Statement From the American Heart Association | journal = Circulation | volume = 134 | issue = 18 | pages = e367–e386 | date = November 2016 | pmid = 27647451 | pmc = 5567876 | doi = 10.1161/CIR.0000000000000444 }}</ref> The [[Centers for Disease Control and Prevention]] has noted that adults who sleep less than seven hours per day are more likely to have chronic health conditions, including heart attack, coronary heart disease, and stroke, compared to those with an adequate amount of sleep.<ref>{{Cite web|date=5 March 2019|title=CDC - Data and Statistics - Sleep and Sleep Disorders|url=https://www.cdc.gov/sleep/data_statistics.html|access-date=21 January 2021|website=www.cdc.gov|language=en-us}}</ref>

In a study that followed over 160,000 healthy, non-obese adults, the subjects who self-reported sleep duration less than six hours a day were at increased risk for developing multiple cardiometabolic risk factors. They presented with increased central obesity, elevated fasting glucose, hypertension, low high-density lipoprotein, hypertriglyceridemia, and metabolic syndrome. The presence or lack of insomnia symptoms did not modify the effects of sleep duration in this study.<ref>{{cite journal | vauthors = Deng HB, Tam T, Zee BC, Chung RY, Su X, Jin L, Chan TC, Chang LY, Yeoh EK, Lao XQ | title = Short Sleep Duration Increases Metabolic Impact in Healthy Adults: A Population-Based Cohort Study | journal = Sleep | volume = 40 | issue = 10 | date = October 2017 | pmid = 28977563 | doi = 10.1093/sleep/zsx130 | doi-access = free }}</ref>

The United Kingdom Biobank studied nearly 500,000 adults who had no cardiovascular disease, and the subjects who slept less than six hours a day were associated with a 20 percent increase in the risk of developing myocardial infarction (MI) over a seven-year follow-up period. Interestingly, a long sleep duration of more than nine hours a night was also a risk factor.<ref>{{cite journal | vauthors = Daghlas I, Dashti HS, Lane J, Aragam KG, Rutter MK, Saxena R, Vetter C | title = Sleep Duration and Myocardial Infarction | journal = Journal of the American College of Cardiology | volume = 74 | issue = 10 | pages = 1304–1314 | date = September 2019 | pmid = 31488267 | pmc = 6785011 | doi = 10.1016/j.jacc.2019.07.022 }}</ref>

==== Immunosuppression ====
Among the myriad of health consequences that sleep deprivation can cause, disruption of the immune system is one of them. While it is not clearly understood, researchers believe that sleep is essential to providing sufficient energy for the immune system to work and allowing inflammation to take place during sleep. Also, just as sleep can reinforce memory in a person's brain, it can help consolidate the memory of the immune system, or [[Adaptive immune system|adaptive immunity]].<ref name=":1">{{Cite web|title=Sleep & Immunity: Can a Lack of Sleep Make You Sick?|url=https://www.sleepfoundation.org/physical-health/how-sleep-affects-immunity|access-date=21 January 2021|website=Sleep Foundation|date=26 October 2018 |language=en}}</ref><ref>{{cite journal | vauthors = Irwin MR | title = Sleep and inflammation: partners in sickness and in health | journal = Nature Reviews. Immunology | volume = 19 | issue = 11 | pages = 702–715 | date = November 2019 | pmid = 31289370 | doi = 10.1038/s41577-019-0190-z }}</ref>

Sleep quality is directly related to immunity levels. The team, led by Professor Cohen of Carnegie Mellon University in the United States, found that even a slight disturbance of sleep may affect the body's response to the cold virus. Those with better sleep quality had significantly higher blood T and B lymphocytes than those with poor sleep quality. These two lymphocytes are the main body of immune function in the human body.<ref>{{Cite web |title=睡眠好坏直接影响免疫力--健康·生活--人民网 |url=http://health.people.com.cn/n1/2020/0331/c14739-31655366.html |access-date=2023-12-05 |website=health.people.com.cn}}</ref>

An adequate amount of sleep improves the effects of vaccines that utilize adaptive immunity. When vaccines expose the body to a weakened or deactivated antigen, the body initiates an immune response. The immune system learns to recognize that antigen and attacks it when exposed again in the future. Studies have found that people who don't sleep the night after getting a vaccine are less likely to develop a proper immune response to the vaccine and sometimes even require a second dose. {{Citation needed|date=June 2023}} People who are sleep deprived in general also do not provide their bodies with sufficient time for an adequate immunological memory to form and, thus, can fail to benefit from vaccination.<ref name=":1" />

People who sleep less than six hours a night are more susceptible to infection and are more likely to catch a cold or flu. A lack of sleep can also prolong the recovery time of patients in the intensive care unit (ICU).<ref name=":1" /><ref>{{cite journal | vauthors = Prather AA, Janicki-Deverts D, Hall MH, Cohen S | title = Behaviorally Assessed Sleep and Susceptibility to the Common Cold | journal = Sleep | volume = 38 | issue = 9 | pages = 1353–1359 | date = September 2015 | pmid = 26118561 | pmc = 4531403 | doi = 10.5665/sleep.4968 }}</ref><ref>{{cite journal | vauthors = Pisani MA, Friese RS, Gehlbach BK, Schwab RJ, Weinhouse GL, Jones SF | title = Sleep in the intensive care unit | journal = American Journal of Respiratory and Critical Care Medicine | volume = 191 | issue = 7 | pages = 731–738 | date = April 2015 | pmid = 25594808 | pmc = 5447310 | doi = 10.1164/rccm.201411-2099CI }}</ref>

====Weight gain ====
{{main|Sleep and weight}}
A lack of sleep can cause an imbalance in several hormones that are critical for weight gain. Sleep deprivation increases the level of ghrelin (hunger hormone) and decreases the level of leptin (fullness hormone), resulting in an increased feeling of hunger and a desire for high-calorie foods.<ref name="VanCauter">{{cite journal | vauthors = Van Cauter E, Spiegel K | title = Sleep as a mediator of the relationship between socioeconomic status and health: a hypothesis | journal = Annals of the New York Academy of Sciences | volume = 896 | issue = 1 | pages = 254–261 | year = 1999 | pmid = 10681902 | doi = 10.1111/j.1749-6632.1999.tb08120.x | bibcode = 1999NYASA.896..254V }}</ref><ref name="RatExperiments"/> Sleep loss is also associated with decreased growth hormone and elevated cortisol levels, which are connected to obesity. People who do not get sufficient sleep can also feel sleepy and fatigued during the day and get less exercise. Obesity can cause poor sleep quality as well. Individuals who are overweight or obese can experience obstructive sleep apnea, gastroesophageal reflux disease (GERD), depression, asthma, and osteoarthritis, all of which can disrupt a good night's sleep.<ref>{{Cite web|title=The Link Between Obesity and Sleep Deprivation|url=https://www.sleepfoundation.org/physical-health/obesity-and-sleep|access-date=21 January 2021|website=Sleep Foundation|date=4 December 2020 |language=en}}</ref>

In rats, prolonged, complete sleep deprivation increased both food intake and energy expenditure, with a net effect of weight loss and ultimately death.<ref>{{cite journal | vauthors = Everson CA, Bergmann BM, Rechtschaffen A | title = Sleep deprivation in the rat: III. Total sleep deprivation | journal = Sleep | volume = 12 | issue = 1 | pages = 13–21 | date = February 1989 | pmid = 2928622 | doi = 10.1093/sleep/12.1.13 | doi-access = free }}</ref> This study hypothesizes that the moderate chronic [[sleep debt]] associated with habitual short sleep is associated with increased appetite and energy expenditure, with the equation tipped towards food intake rather than expenditure in societies where high-calorie food is freely available.<ref name="RatExperiments">{{cite journal | vauthors = Taheri S, Lin L, Austin D, Young T, Mignot E | title = Short sleep duration is associated with reduced leptin, elevated ghrelin, and increased body mass index | journal = PLOS Medicine | volume = 1 | issue = 3 | pages = e62 | date = December 2004 | pmid = 15602591 | pmc = 535701 | doi = 10.1371/journal.pmed.0010062 | doi-access = free }}</ref>

====Type 2 diabetes====
It has been suggested that people experiencing short-term sleep restrictions process glucose more slowly than individuals receiving a full 8 hours of sleep, increasing the likelihood of developing type 2 [[diabetes]].<ref>{{Cite web|date=2007|title=Sleep and Disease Risk|url=http://healthysleep.med.harvard.edu/healthy/matters/consequences/sleep-and-disease-risk|url-status=live|archive-url=https://web.archive.org/web/20160325003506/http://healthysleep.med.harvard.edu/healthy/matters/consequences/sleep-and-disease-risk|archive-date=25 March 2016|website=Healthy Sleep|publisher=Harvard Medical School}}</ref> Poor sleep quality is linked to high blood sugar levels in diabetic and prediabetic patients, but the causal relationship is not clearly understood. Researchers suspect that sleep deprivation affects insulin, cortisol, and oxidative stress, which subsequently influence blood sugar levels. Sleep deprivation can increase the level of [[ghrelin]] and decrease the level of [[leptin]]. People who get insufficient amounts of sleep are more likely to crave food in order to compensate for the lack of energy. This habit can raise blood sugar and put them at risk of [[obesity]] and diabetes.<ref>{{Cite web|title=Diabetes and Sleep: Sleep Disturbances & Coping|url=https://www.sleepfoundation.org/physical-health/lack-of-sleep-and-diabetes|access-date=21 January 2021|website=Sleep Foundation|date=20 November 2020|language=en}}</ref>

In 2005, a study of over 1400 participants showed that participants who habitually slept fewer hours were more likely to have associations with [[type 2 diabetes]].<ref name="DGottlieb">{{cite journal | vauthors = Gottlieb DJ, Punjabi NM, Newman AB, Resnick HE, Redline S, Baldwin CM, Nieto FJ | title = Association of sleep time with diabetes mellitus and impaired glucose tolerance | journal = Archives of Internal Medicine | volume = 165 | issue = 8 | pages = 863–867 | date = April 2005 | pmid = 15851636 | doi = 10.1001/archinte.165.8.863 | doi-access = free }}</ref> However, because this study was merely correlational, the direction of cause and effect between little sleep and diabetes is uncertain. The authors point to an earlier study that showed that experimental rather than habitual restriction of sleep resulted in [[impaired glucose tolerance]] (IGT).<ref>{{cite journal | vauthors = Spiegel K, Leproult R, Van Cauter E | title = Impact of sleep debt on metabolic and endocrine function | journal = Lancet | volume = 354 | issue = 9188 | pages = 1435–1439 | date = October 1999 | pmid = 10543671 | doi = 10.1016/S0140-6736(99)01376-8 }}</ref>

====Other effects====
Sleep deprivation may facilitate or intensify:<ref name="SleepDep">{{cite web|title=Sleep deprivation|url=http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Sleep_deprivation?OpenDocument|url-status=dead|archive-url=https://web.archive.org/web/20090820003333/http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Sleep_deprivation?OpenDocument|archive-date=20 August 2009|work=betterhealth.vic.gov.au}}</ref>
* aching muscles<ref>{{cite book| vauthors = Morin CM |url=https://archive.org/details/springer_10.1007-b105845|title=Insomnia|publisher=Kluwer Academic/Plenum Publ.|year=2003|isbn=978-0-306-47750-8|location=New York|page=[https://archive.org/details/springer_10.1007-b105845/page/n39 28] death}}</ref>
*[[confusion]], [[memory]] lapses or loss<ref name="BrainBasics">{{cite web | url = http://www.ninds.nih.gov/disorders/brain_basics/understanding_sleep.htm | work = National Institute of Neurological Disorders and Stroke | title = Brain Basics: Understanding Sleep | archive-url = https://web.archive.org/web/20071011011207/http://www.ninds.nih.gov/disorders/brain_basics/understanding_sleep.htm| archive-date=11 October 2007}}</ref>
* [[depression (mood)|depression]]<ref name="BrainBasics" />
* development of [[false memory]]
* [[hypnagogic]] and [[hypnopompic]] [[hallucination]]s during falling asleep and waking, which are entirely normal<ref name="Ohayon_et_al_1996">{{cite journal | vauthors = Ohayon MM, Priest RG, Caulet M, Guilleminault C | title = Hypnagogic and hypnopompic hallucinations: pathological phenomena? | journal = The British Journal of Psychiatry | volume = 169 | issue = 4 | pages = 459–467 | date = October 1996 | pmid = 8894197 | doi = 10.1192/bjp.169.4.459 }}</ref>
* hand [[tremor]]<ref>{{cite book| vauthors = Smith AP |title=Handbook of Human Performance|publisher=Acad. Press|year=1992|isbn=978-0-12-650352-4|location=London|page=240}}</ref>
* [[headaches]]
* [[malaise]]
* [[stye]]
* [[periorbital puffiness]], commonly known as "bags under eyes" or [[eye bags]]
* increased [[blood pressure]]<ref name="health.harvard.edu">{{cite web|date=31 May 2012|title=Harvard Heart Letter examines the costs of not getting enough sleep – Harvard Health Publications|url=http://www.health.harvard.edu/press_releases/sleep_deprivation_problem.htm|url-status=live|archive-url=https://web.archive.org/web/20110509104601/http://www.health.harvard.edu/press_releases/sleep_deprivation_problem.htm|archive-date=9 May 2011|access-date=13 August 2012|publisher=Health.harvard.edu}}</ref>
* increased [[stress hormone]] levels<ref name="health.harvard.edu" />
* increased risk of type 2 [[diabetes]]<ref name="health.harvard.edu" />
* lowering of [[immunity (medical)|immunity]], increased susceptibility to illness<ref>{{cite web| vauthors = Olson E |date=9 June 2015|title=Lack of sleep: Can it make you sick?|url=https://www.mayoclinic.org/diseases-conditions/insomnia/expert-answers/lack-of-sleep/faq-20057757|access-date=26 August 2018|publisher=[[Mayo Clinic]]}}</ref>
* increased risk of [[fibromyalgia]]<ref>{{cite web|title=The Role of Magnesium in Fibromyalgia|url=http://web.mit.edu/london/www/magnesium.html|url-status=live|archive-url=https://web.archive.org/web/20120729085013/http://web.mit.edu/london/www/magnesium.html|archive-date=29 July 2012|access-date=13 August 2012|publisher=Web.mit.edu}}</ref>
* [[irritability]]<ref name="SleepDep" />
* [[nystagmus]] (rapid involuntary rhythmic eye movement)<ref>{{cite journal |last1=Citek |first1=Karl |last2=Ball |first2=Bret |last3=Rutledge |first3=Dale A. |title=Nystagmus testing in intoxicated individuals |journal=Optometry |date=November 2003 |volume=74 |issue=11 |pages=695–710 |pmid=14653658 }}</ref>
* [[obesity]]<ref name="health.harvard.edu" />
* [[epileptic seizure|seizures]]<ref>{{cite book| vauthors = Engel J, Pedley TA, Aicardi J |url= https://books.google.com/books?id=TwlXrOBkAS8C&q=sleep+deprivation+seizure&pg=PA77|title=Epilepsy: A Comprehensive Textbook - Google Books|year=2008|publisher=Lippincott Williams & Wilkins |isbn=978-0-7817-5777-5|access-date=30 January 2015}}</ref>
* [[mania]]<ref>{{cite journal |last1=Wehr |first1=Thomas A. |title=Sleep-Loss as a Possible Mediator of Diverse Causes of Mania |journal=British Journal of Psychiatry |date=October 1991 |volume=159 |issue=4 |pages=576–578 |doi=10.1192/bjp.159.4.576 |pmid=1751874 }}</ref>
*[[Sleep inertia]]<ref>{{Cite web|date=20 August 2009|title=Sleep deprivation - Better Health Channel.|url=http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Sleep_deprivation?OpenDocument|archive-url=https://web.archive.org/web/20090820003333/http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Sleep_deprivation?OpenDocument|archive-date=20 August 2009|access-date=24 October 2019}}</ref>
* [[tachycardia]] risk. One study found that a single night of sleep deprivation may cause tachycardia, a condition in which the heartrate exceeds 100 beats per minute (in the following day).<ref>{{Cite web |title=Tachycardia - Symptoms and causes |url=https://www.mayoclinic.org/diseases-conditions/tachycardia/symptoms-causes/syc-20355127 |access-date=2022-06-27 |website=Mayo Clinic |language=en}}</ref><ref name="sleeptachy">{{cite journal | vauthors = Rangaraj VR, Knutson KL | title = Association between sleep deficiency and cardiometabolic disease: implications for health disparities | journal = Sleep Medicine | volume = 18 | pages = 19–35 | date = February 2016 | pmid = 26431758 | pmc = 4758899 | doi = 10.1016/j.sleep.2015.02.535 }}</ref>
* [[temper tantrums]] in children<ref name="SleepDep" />
* violent behavior<ref>{{cite journal | vauthors = Vaughn MG, Salas-Wright CP, White NA, Kremer KP | title = Poor sleep and reactive aggression: Results from a national sample of African American adults | journal = Journal of Psychiatric Research | volume = 66-67 | pages = 54–59 | year = 2015 | pmid = 25940021 | doi = 10.1016/j.jpsychires.2015.04.015 }}</ref>
* [[yawn]]ing<ref name="SleepDep" />

Sleep deprivation may cause symptoms similar to:
* [[attention-deficit hyperactivity disorder]] (ADHD)<ref name="SleepDep" />
* [[psychosis]]<ref name="Ohayon_et_al_1996" /><ref>{{cite web | url = http://ts-si.org/content/view/2634/992/ | title = Neural Link Between Sleep Loss And Psychiatric Disorders | archive-url = https://web.archive.org/web/20090228192413/http://ts-si.org/content/view/2634/992/| archive-date=28 February 2009 | work = ts-si.org | date = 24 October 2007 }}</ref><ref name="sleep_dep">{{cite journal | vauthors = Chan-Ob T, Boonyanaruthee V | title = Meditation in association with psychosis | journal = Journal of the Medical Association of Thailand = Chotmaihet Thangphaet | volume = 82 | issue = 9 | pages = 925–930 | date = September 1999 | pmid = 10561951 }}</ref><ref name="sleep_dep3">{{cite journal | vauthors = Devillières P, Opitz M, Clervoy P, Stephany J | title = [Delusion and sleep deprivation] | journal = L'Encephale | volume = 22 | issue = 3 | pages = 229–231 | date = May–June 1996 | pmid = 8767052 }}</ref>

===Positive effects===

====Increased energy and alertness in some cases====
In a subset of cases, sleep deprivation can paradoxically lead to increased energy and alertness.<ref name="REM deprivation in healthy people"/><ref name="Sleep and depression review"/>

====Other====

See the Uses section below for possible beneficial benefits of sleep deprivation on treating depression and insomnia.

==Causes==

People aged 18 to 64 need seven to nine hours of sleep per night.<ref>{{Cite web |date=2022-03-25 |title=Here's What Happens When You Don't Get Enough Sleep (And How Much You Really Need a Night) |url=https://health.clevelandclinic.org/happens-body-dont-get-enough-sleep/ |access-date=2022-04-17 |website=Cleveland Clinic |language=en-US}}</ref> Sleep deprivation occurs when this is not achieved. Causes of this can be as follows:

===Environmental Factors===
Environmental factors significantly influence sleep quality and can contribute to sleep deprivation in various ways. Noise pollution from traffic, construction, and loud neighbors can disrupt sleep by causing awakenings and preventing deeper sleep stages.<ref>{{cite journal |last1=Zaharna |first1=Mia |last2=Guilleminault |first2=Christian |title=Sleep, noise and health: Review |journal=Noise and Health |date=2010 |volume=12 |issue=47 |pages=64 |doi=10.4103/1463-1741.63205 |doi-access=free }}</ref> Similarly, light exposure, particularly from artificial sources like screens, interferes with the body’s natural circadian rhythms by suppressing melatonin production, making it challenging to fall asleep.<ref>{{cite journal |last1=Touitou |first1=Yvan |last2=Reinberg |first2=Alain |last3=Touitou |first3=David |title=Association between light at night, melatonin secretion, sleep deprivation, and the internal clock: Health impacts and mechanisms of circadian disruption |journal=Life Sciences |date=March 2017 |volume=173 |pages=94–106 |doi=10.1016/j.lfs.2017.02.008 }}</ref> Air quality, odours and temperatures can all affect sleep quality and duration as well.<ref>{{cite book |doi=10.1201/b14428-11 |chapter=Environmental Influences on Sleep and Sleep Deprivation |title=Sleep Deprivation |date=2004 |pages=148–183 |isbn=978-0-429-22511-6 |editor1-first=Clete A. |editor1-last=Kushida }}</ref>

To mitigate the effects of these environmental influences, individuals can consider strategies, such as using soundproofing measures, installing blackout curtains, adjusting room temperatures,<ref>{{cite journal |last1=Schmidt-Kessen |first1=W. |last2=Kendel |first2=K. |title=Einfluß der Raumtemperatur auf den Nachtschlaf |trans-title=The influence of room temperature on night-sleep in man |language=de |journal=Research in Experimental Medicine |date=September 1973 |volume=160 |issue=3 |pages=220–233 |doi=10.1007/bf01856786 |pmid=4350670 }}</ref> investing in comfortable bedding, and improving air quality with purifiers. By addressing these environmental factors, individuals can enhance their sleep hygiene and overall health.

===Insomnia===
{{Main|Insomnia}}
[[Insomnia]], one of the six types of [[dyssomnia]], affects 21–37% of the adult population.<ref name="UKInsomnia">{{cite journal |last1=Morphy |first1=Hannah |last2=Dunn |first2=Kate M. |last3=Lewis |first3=Martyn |last4=Boardman |first4=Helen F. |last5=Croft |first5=Peter R. |title=Epidemiology of insomnia: a longitudinal study in a UK population |journal=Sleep |date=March 2007 |volume=30 |issue=3 |pages=274–280 |pmid=17425223 }}</ref><ref name="JapanInsomnia">{{cite journal | vauthors = Kim K, Uchiyama M, Okawa M, Liu X, Ogihara R | title = An epidemiological study of insomnia among the Japanese general population | journal = Sleep | volume = 23 | issue = 1 | pages = 41–47 | date = February 2000 | pmid = 10678464 | doi = 10.1093/sleep/23.1.1a | doi-access = free }}</ref><ref>{{cite journal |last1=Rajaee Rizi |first1=Farid |last2=Asgarian |first2=Fatemeh Sadat |title=Reliability, validity, and psychometric properties of the Persian version of the Tayside children's sleep questionnaire |journal=Sleep and Biological Rhythms |date=January 2023 |volume=21 |issue=1 |pages=97–103 |doi=10.1007/s41105-022-00420-6 |pmid=38468908 |pmc=10899986 }}</ref> Many of its symptoms are easily recognizable, including [[excessive daytime sleepiness]]; frustration or worry about sleep; problems with attention, concentration, or memory; extreme mood changes or irritability; lack of energy or motivation; poor performance at school or work; and tension headaches or stomach aches.

Insomnia can be grouped into primary and secondary, or [[Comorbidity|comorbid]], insomnia.<ref name="WHO">{{cite web|title=Dyssomnias|url=https://www.who.int/selection_medicines/committees/expert/17/application/Section24_GAD.pdf|url-status=live|archive-url=https://web.archive.org/web/20090318104517/http://www.who.int/selection_medicines/committees/expert/17/application/Section24_GAD.pdf|archive-date=18 March 2009|access-date=25 January 2009|publisher=WHO|pages=7–11}}</ref><ref>{{cite journal | vauthors = Buysse DJ | title = Chronic insomnia | journal = The American Journal of Psychiatry | volume = 165 | issue = 6 | pages = 678–686 | date = June 2008 | pmid = 18519533 | pmc = 2859710 | doi = 10.1176/appi.ajp.2008.08010129 | quote = For this reason, the NIH conference [of 2005] commended the term "comorbid insomnia" as a preferable alternative to the term "secondary insomnia." }}</ref><ref>{{Cite journal| vauthors = Erman MK | title = Insomnia: Comorbidities and Consequences | journal = Primary Psychiatry | date = 2007 | volume = 14 | issue = 6 | pages = 31–35 |url=http://www.primarypsychiatry.com/aspx/articledetail.aspx?articleid=1102|url-status=live |archive-url= https://web.archive.org/web/20110715113025/http://www.primarypsychiatry.com/aspx/articledetail.aspx?articleid=1102 |archive-date=15 July 2011|quote=Two general categories of insomnia exist, primary insomnia and comorbid insomnia.}}</ref>

Primary insomnia is a [[sleep disorder]] not attributable to a medical, psychiatric, or environmental cause.<ref>{{cite web|author=World Health Organization|year=2007|title=Quantifying burden of disease from environmental noise|url=http://www.euro.who.int/__data/assets/pdf_file/0005/87638/Noise_EDB_2nd_mtg.pdf|url-status=live|archive-url=https://web.archive.org/web/20101123213411/http://www.euro.who.int/__data/assets/pdf_file/0005/87638/Noise_EDB_2nd_mtg.pdf|archive-date=23 November 2010|access-date=22 September 2010|page=20}}</ref> There are three main types of primary insomnia. These include psychophysiological, idiopathic insomnia, and [[sleep state misperception]] (paradoxical insomnia).<ref name="WHO" /> Psychophysiological insomnia is anxiety-induced. Idiopathic insomnia generally begins in childhood and lasts for the rest of a person's life. It's suggested that idiopathic insomnia is a neurochemical problem in a part of the brain that controls the sleep-wake cycle, resulting in either under-active sleep signals or over-active wake signals. Sleep state misperception is diagnosed when people get enough sleep but inaccurately perceive that their sleep is insufficient.<ref>{{cite journal | vauthors = Lai C, Qiu H | title = Paradoxical Insomnia: Misperception of Sleep Can Be a Tormenting Experience | journal = American Family Physician | volume = 95 | issue = 12 | pages = 770 | date = June 2017 | pmid = 28671423 | url = https://www.aafp.org/afp/2017/0615/p770.html | access-date = 10 May 2020 }}</ref>

Secondary insomnia, or comorbid insomnia, occurs concurrently with other medical, neurological, psychological, and psychiatric conditions. Causation is not necessarily implied.<ref>Biological Rhythms, Sleep and Hypnosis by Simon Green</ref> Causes can be from depression, anxiety, and personality disorders.<ref>{{cite journal | vauthors = McCrae CS, Lichstein KL | title = Secondary insomnia: diagnostic challenges and intervention opportunities | journal = Sleep Medicine Reviews | volume = 5 | issue = 1 | pages = 47–61 | date = February 2001 | pmid = 12531044 | doi = 10.1053/smrv.2000.0146 }}</ref>

===Sleep apnea===
{{Main|Sleep apnea}}
Sleep apnea is a serious disorder that has symptoms of both insomnia and sleep deprivation, among other symptoms like excessive daytime sleepiness, abrupt awakenings, and difficulty concentrating.<ref name="mayoclinic.org">{{Cite web |title=Obstructive sleep apnea - Symptoms and causes |url=https://www.mayoclinic.org/diseases-conditions/obstructive-sleep-apnea/symptoms-causes/syc-20352090 |access-date=2022-04-17 |website=Mayo Clinic |language=en}}</ref> It is a sleep related breathing disorder that can cause partial or complete obstruction of the upper airways during sleep.<ref name="Shaik et al Sleep and Safety among Healthcare Workers">{{cite journal |last1=Shaik |first1=Likhita |last2=Cheema |first2=Mustafa S. |last3=Subramanian |first3=Shyam |last4=Kashyap |first4=Rahul |last5=Surani |first5=Salim R. |title=Sleep and Safety among Healthcare Workers: The Effect of Obstructive Sleep Apnea and Sleep Deprivation on Safety |journal=Medicina |date=24 November 2022 |volume=58 |issue=12 |pages=1723 |doi=10.3390/medicina58121723 |doi-access=free |pmid=36556925 |pmc=9788062 }}</ref> One billion people worldwide are affected by obstructive sleep apnea.<ref name="Shaik et al Sleep and Safety among Healthcare Workers"/> Those with sleep apnea may experience symptoms such as awakening gasping or [[choking]], restless sleep, morning headaches, morning confusion or irritability, and restlessness. This disorder affects 1 to 10 percent of Americans.<ref>{{Cite book| vauthors = Zammit GK |url=https://archive.org/details/goodnightshowtos00zamm|title=Good nights : how to stop sleep deprivation, overcome insomnia, and get the sleep you need|date=1997|publisher=Andrews and McMeel|others=Zanca, Jane A.|isbn=0-8362-2188-5|location=Kansas City|oclc=35849087|url-access=registration}}</ref> It has many serious health outcomes if left untreated. [[Positive airway pressure]] therapy using CPAP ([[continuous positive airway pressure]]), APAP, or BPAP devices is considered the first-line treatment option for sleep apnea.<ref name="pmid26336596">{{cite journal | vauthors = Spicuzza L, Caruso D, Di Maria G | title = Obstructive sleep apnoea syndrome and its management | journal = Therapeutic Advances in Chronic Disease | volume = 6 | issue = 5 | pages = 273–85 | date = September 2015 | pmid = 26336596 | pmc = 4549693 | doi = 10.1177/2040622315590318 }}</ref>

Central [[sleep apnea]] is caused by a failure of the central nervous system to signal the body to breathe during sleep. Treatments similar to obstructive sleep apnea may be used, as well as other treatments such as adaptive servo ventilation and certain medications. Some medications, such as opioids, may contribute to or cause central sleep apnea.<ref>{{cite journal | vauthors = Muza RT | title = Central sleep apnoea-a clinical review | journal = Journal of Thoracic Disease | volume = 7 | issue = 5 | pages = 930–937 | date = May 2015 | pmid = 26101651 | pmc = 4454847 | doi = 10.3978/j.issn.2072-1439.2015.04.45 }}</ref>

===Self-imposed===
Sleep deprivation can sometimes be self-imposed due to a lack of desire to sleep or the habitual use of stimulant drugs. Revenge Bedtime Procrastination is a need to stay up late after a busy day to feel like the day is longer, leading to sleep deprivation from staying up and wanting to make the day "seem/feel" longer.<ref name="auto1">{{Cite web |date=2021-02-23 |title=Revenge Bedtime Procrastination: Definition & Psychology |url=https://www.sleepfoundation.org/sleep-hygiene/revenge-bedtime-procrastination |access-date=2024-03-13 |website=Sleep Foundation |language=en-US}}</ref>

====Caffeine====
[[File:Health effects of caffeine.png|thumb|300x300px|This diagram shows how caffeine affects the different areas of the body, both positively and negatively.]]
Consumption of [[caffeine]] in large quantities can have negative effects on one's sleep cycle.

Caffeine consumption, usually in the form of coffee, is one of the most widely used stimulants in the world.<ref name="O'Callaghan et al Effects of caffeine on sleep quality">{{cite journal |last1=O'Callaghan |first1=Frances |last2=Muurlink |first2=Olav |last3=Reid |first3=Natasha |title=Effects of caffeine on sleep quality and daytime functioning |journal=Risk Management and Healthcare Policy |date=December 2018 |volume=11 |pages=263–271 |doi=10.2147/rmhp.s156404 |doi-access=free |pmid=30573997 |pmc=6292246 }}</ref> While there are short-term performance benefits to caffeine consumption, overuse can lead to insomnia symptoms or worsen pre-existing insomnia.<ref>{{cite journal | vauthors = Chaudhary NS, Grandner MA, Jackson NJ, Chakravorty S | title = Caffeine consumption, insomnia, and sleep duration: Results from a nationally representative sample | journal = Nutrition | volume = 32 | issue = 11–12 | pages = 1193–1199 | date = 2016-11-01 | pmid = 27377580 | pmc = 6230475 | doi = 10.1016/j.nut.2016.04.005 }}</ref> Consuming caffeine to stay awake at night may lead to sleeplessness, anxiety, frequent nighttime awakenings, and overall poorer sleep quality.<ref>{{Cite web |date=2009-04-17 |title=Caffeine's Connection to Sleep Problems |url=https://www.sleepfoundation.org/nutrition/caffeine-and-sleep |access-date=2022-04-17 |website=Sleep Foundation |language=en}}</ref> The main metabolite of melatonin (6-sulfatoxymelatonin) gets reduced with consumption of caffeine in the day, which is one of the mechanisms by which sleep is interrupted.<ref name="O'Callaghan et al Effects of caffeine on sleep quality"/>

====Studying====
{{See also|Sleep deprivation in higher education}}

The [[United States|U.S.]] [[National Sleep Foundation]] cites a 1996 paper showing that college/university-aged students get an average of less than 6 hours of sleep each night.<ref>{{Cite web|title=National Sleep Foundation Key Messages/Talking Points|url=https://sleepfoundation.org/sites/default/files/Drowsy%20Driving-Key%20Messages%20and%20Talking%20Points.pdf|url-status=live|archive-url=https://web.archive.org/web/20160418142432/https://sleepfoundation.org/sites/default/files/Drowsy%20Driving-Key%20Messages%20and%20Talking%20Points.pdf|archive-date=18 April 2016|access-date=18 April 2016}}</ref> A 2018 study highlights the need for a good night's sleep for students, finding that college students who averaged eight hours of sleep for the five nights of finals week scored higher on their final exams than those who did not.<ref>{{Cite web| vauthors = Schroeder J |date=7 December 2018|title=Students Who Sleep 8 Hours Score Higher On Final Exams|url=https://www.tun.com/blog/students-who-sleep-8-hours-score-higher-on-final-exams/|access-date=10 December 2018|website=The University Network}}</ref>

In the study, 70.6% of students reported obtaining less than 8 hours of sleep, and up to 27% of students may be at risk for at least one sleep disorder.<ref>{{cite journal | vauthors = Hershner SD, Chervin RD | title = Causes and consequences of sleepiness among college students | journal = Nature and Science of Sleep | volume = 6 | pages = 73–84 | date = 23 June 2014 | pmid = 25018659 | pmc = 4075951 | doi = 10.2147/NSS.S62907 | doi-access = free }}</ref> Sleep deprivation is common in first-year college students as they adjust to the stress and social activities of college life.

Estevan et al. studied the relationships between sleep and test performance. They found that students tend to sleep less than usual the night before an exam and that exam performance was positively correlated with sleep duration.<ref>{{cite journal | vauthors = Estevan I, Sardi R, Tejera AC, Silva A, Tassino B | title = Should I study or should I go (to sleep)? The influence of test schedule on the sleep behavior of undergraduates and its association with performance | journal = PLOS ONE | volume = 16 | issue = 3 | pages = e0247104 | date = March 10, 2021 | pmid = 33690625 | pmc = 7946303 | doi = 10.1371/journal.pone.0247104 | doi-access = free | bibcode = 2021PLoSO..1647104E }}</ref>

A study performed by the Department of Psychology at the [[National Chung Cheng University]] in Taiwan concluded that freshmen received the least amount of sleep during the week.<ref name="Sleep patterns in college students; Gender and grade differences">{{cite journal |last1=Tsai |first1=Ling-Ling |last2=Li |first2=Sheng-Ping |title=Sleep patterns in college students |journal=Journal of Psychosomatic Research |date=February 2004 |volume=56 |issue=2 |pages=231–237 |doi=10.1016/S0022-3999(03)00507-5 |pmid=15016583 }}</ref>

Studies of later start times in schools have consistently reported benefits to [[adolescent sleep]], health, and learning using a wide variety of methodological approaches. In contrast, there are no studies showing that early start times have any positive impact on sleep, health, or learning.<ref name = "Kelly_2014">{{cite journal| vauthors = Kelley P, Lockley SW, Foster RG, Kelley J |date=1 August 2014|title=Synchronizing education to adolescent biology: 'let teens sleep, start school later'|journal=Learning, Media and Technology|volume=40|issue=2|page=220|doi=10.1080/17439884.2014.942666|doi-access=free}}</ref> Data from international studies demonstrate that "synchronized" start times for adolescents are far later than the start times in the overwhelming majority of educational institutions.<ref name = "Kelly_2014" /> In 1997, [[University of Minnesota]] researchers compared students who started school at 7:15&nbsp;a.m. with those who started at 8:40&nbsp;a.m. They found that students who started at 8:40 got higher grades and more sleep on weekday nights than those who started earlier.<ref name="SleepDepReport">{{cite journal |author-link=Siri Carpenter |vauthors=Carpenter S |year=2001 |title=Sleep deprivation may be undermining teen health |url=http://www.apa.org/monitor/oct01/sleepteen.html |url-status=live |journal=Monitor on Psychology |volume=32 |issue=9 |page=42 |archive-url=https://web.archive.org/web/20061006064800/http://www.apa.org/monitor/oct01/sleepteen.html |archive-date=6 October 2006}}</ref> One in four U.S. high school students admits to falling asleep in class at least once a week.<ref name="SleepDepAbcNews">{{cite news| vauthors = Schmid RE |date=28 March 2006|title=Sleep-deprived teens dozing off at school|work=ABC News|agency=Associated Press|url=https://abcnews.go.com/US/wireStory?id=1775003|url-status=dead|archive-url=https://web.archive.org/web/20061208094359/https://abcnews.go.com/US/wireStory?id=1775003|archive-date=8 December 2006}}</ref>

It is known that during human adolescence, [[circadian rhythm]]s and, therefore, sleep patterns typically undergo marked changes. [[Electroencephalography|Electroencephalogram]] (EEG) studies indicate a 50% reduction in deep (stage 4) sleep and a 75% reduction in the peak amplitude of delta waves during NREM sleep in adolescence. School schedules are often incompatible with a corresponding delay in sleep offset, leading to a less than optimal amount of sleep for the majority of adolescents.<ref>{{cite journal | vauthors = Giedd JN | title = Linking adolescent sleep, brain maturation, and behavior | journal = The Journal of Adolescent Health | volume = 45 | issue = 4 | pages = 319–320 | date = October 2009 | pmid = 19766933 | pmc = 3018343 | doi = 10.1016/j.jadohealth.2009.07.007 }}</ref>

===Mental illness===
Chronic sleep problems affect 50% to 80% of patients in a typical psychiatric practice, compared with 10% to 18% of adults in the general U.S. population. Sleep problems are particularly common in patients with anxiety, depression, bipolar disorder, and attention deficit hyperactivity disorder (ADHD).<ref name="mayoclinic.org"/>

The specific causal relationships between sleep loss and effects on psychiatric disorders have been most extensively studied in patients with mood disorders.<ref>{{cite journal | vauthors = Benca RM | title = Sleep in psychiatric disorders | journal = Neurologic Clinics | volume = 14 | issue = 4 | pages = 739–764 | date = November 1996 | pmid = 8923493 | doi = 10.1016/s0733-8619(05)70283-8 }}</ref>{{medical citation needed|date=March 2021}} Shifts into [[mania]] in bipolar patients are often preceded by periods of [[insomnia]],<ref>{{cite journal | vauthors = McKenna BS, Eyler LT | title = Overlapping prefrontal systems involved in cognitive and emotional processing in euthymic bipolar disorder and following sleep deprivation: a review of functional neuroimaging studies | journal = Clinical Psychology Review | volume = 32 | issue = 7 | pages = 650–663 | date = November 2012 | pmid = 22926687 | pmc = 3922056 | doi = 10.1016/j.cpr.2012.07.003 }}</ref> and sleep deprivation has been shown to induce a manic state in about 30% of patients.<ref>{{cite journal | vauthors = Young JW, Dulcis D | title = Investigating the mechanism(s) underlying switching between states in bipolar disorder | journal = European Journal of Pharmacology | volume = 759 | pages = 151–162 | date = July 2015 | pmid = 25814263 | pmc = 4437855 | doi = 10.1016/j.ejphar.2015.03.019 }}</ref> Sleep deprivation may represent a final common pathway in the genesis of mania,<ref>{{cite journal | vauthors = Wehr TA, Sack DA, Rosenthal NE | title = Sleep reduction as a final common pathway in the genesis of mania | journal = The American Journal of Psychiatry | volume = 144 | issue = 2 | pages = 201–204 | date = February 1987 | pmid = 3812788 | doi = 10.1176/ajp.144.2.201 }}</ref> and manic patients usually have a continuous reduced need for sleep.<ref>{{cite book|author=American Psychiatry Association|title=Diagnostic and Statistical Manual of Mental Disorders|date=2013|publisher=American Psychiatric Publishing |location=Arlington |isbn=978-0-89042-555-8 |pages=123–154 |edition=5th}}</ref>

The symptoms of sleep deprivation and those of [[schizophrenia]] are parallel, including those of positive and cognitive symptoms.<ref name="Pocivavsek">{{cite journal | vauthors = Pocivavsek A, Rowland LM | title = Basic Neuroscience Illuminates Causal Relationship Between Sleep and Memory: Translating to Schizophrenia | journal = Schizophrenia Bulletin | volume = 44 | issue = 1 | pages = 7–14 | date = January 2018 | pmid = 29136236 | pmc = 5768044 | doi = 10.1093/schbul/sbx151 }}</ref>

=== Hospital stay ===
A study performed nationwide in the Netherlands found that general ward patients staying at the hospital experienced shorter total sleep (83 min. less), more night-time awakenings, and earlier awakenings compared to sleeping at home. Over 70% experienced being woken up by external causes, such as hospital staff (35.8%). Sleep-disturbing factors included the noise of other patients, medical devices, pain, and toilet visits.<ref>{{cite journal | vauthors = Wesselius HM, van den Ende ES, Alsma J, Ter Maaten JC, Schuit SC, Stassen PM, de Vries OJ, Kaasjager KH, Haak HR, van Doormaal FF, Hoogerwerf JJ, Terwee CB, van de Ven PM, Bosch FH, van Someren EJ, Nanayakkara PW | title = Quality and Quantity of Sleep and Factors Associated With Sleep Disturbance in Hospitalized Patients | journal = JAMA Internal Medicine | volume = 178 | issue = 9 | pages = 1201–1208 | date = September 2018 | pmid = 30014139 | pmc = 6142965 | doi = 10.1001/jamainternmed.2018.2669 }}</ref> Sleep deprivation is even more severe in ICU patients, where the naturally occurring nocturnal peak of melatonin secretion was found to be absent, possibly causing the disruption in the normal sleep-wake cycle.<ref>{{cite journal | vauthors = Shilo L, Dagan Y, Smorjik Y, Weinberg U, Dolev S, Komptel B, Balaum H, Shenkman L | title = Patients in the intensive care unit suffer from severe lack of sleep associated with loss of normal melatonin secretion pattern | journal = The American Journal of the Medical Sciences | volume = 317 | issue = 5 | pages = 278–281 | date = May 1999 | pmid = 10334113 | doi = 10.1016/s0002-9629(15)40528-2 }}</ref> However, as the personal characteristics and the clinical picture of hospital patients are so diverse, the possible solutions to improve sleep and circadian rhythmicity should be tailored to the individual and within the possibilities of the hospital ward. Multiple interventions could be considered to aid patient characteristics, improve hospital routines, or improve the hospital environment.<ref>{{cite journal | vauthors = Tan X, van Egmond L, Partinen M, Lange T, Benedict C | title = A narrative review of interventions for improving sleep and reducing circadian disruption in medical inpatients | journal = Sleep Medicine | volume = 59 | pages = 42–50 | date = July 2019 | pmid = 30415906 | doi = 10.1016/j.sleep.2018.08.007 | doi-access = free }}</ref>

===Time online===
A 2018 study published in the [[Journal of Economic Behavior and Organization]] found that broadband internet connection was associated with sleep deprivation. The study concluded that people with a broadband connection tend to sleep 25 minutes less than those without a broadband connection; hence, they are less likely to get the scientifically recommended 7–9 hours of sleep.<ref>{{cite press release |title=Broadband internet causes sleep deprivation, a new study finds |url=https://www.sciencedaily.com/releases/2018/08/180802102340.htm |work=ScienceDaily |publisher=Bocconi University |date=2 August 2018 }}</ref> Another study conducted on 435 non-medical staff at [[King Saud University]] Medical City reported that 9 out of 10 of the respondents used their smartphones at bedtime, with social media being the most used service (80.5%). The study found participants who spent more than 60 minutes using their smartphones at bedtime were 7.4 times more likely to have poor sleep quality than participants who spent less than 15 minutes.<ref>{{cite journal | vauthors = Alshobaili FA, AlYousefi NA | title = The effect of smartphone usage at bedtime on sleep quality among Saudi non- medical staff at King Saud University Medical City | journal = Journal of Family Medicine and Primary Care | volume = 8 | issue = 6 | pages = 1953–1957 | date = June 2019 | pmid = 31334161 | pmc = 6618184 | doi = 10.4103/jfmpc.jfmpc_269_19 | doi-access = free }}</ref> Overall, internet usage an hour before bedtime has been found to disrupt sleeping patterns.

=== Shift work ===
Many businesses are operational 24/7, such as airlines, hospitals, etc., where workers perform their duties in different shifts. [[Shift work]] patterns cause sleep deprivation and lead to poor concentration, detrimental health effects, and fatigue. Shift work can disrupt the normal circadian rhythms of biologic functions, which is associated with the sleep/wake cycle. Both the sleep length and quality can be affected. A “shift-work sleep disorder” has been diagnosed in approximately 10% of shift workers aged between 18-65 years old according to the International Classification of Sleep Disorders, version 2 (ICSD-2).<ref>{{cite book |doi=10.1016/B978-0-444-62627-1.00023-8 |chapter=Sleep deprivation due to shift work |title=Occupational Neurology |series=Handbook of Clinical Neurology |date=2015 |last1=Costa |first1=Giovanni |volume=131 |pages=437–446 |pmid=26563802 |isbn=978-0-444-62627-1 }}</ref> Shift work remains an unspoken challenge within industries, often disregarded by both employers and employees alike, leading to an increase in occupational injuries. A worker experiencing fatigue poses a potential danger, not only to themselves, but also to others around them. Both employers and employees must acknowledge the risks associated with sleep deprivation and on-the-job fatigue to effectively mitigate the chances of occupational injuries.<ref>{{Cite web | vauthors = Malik A |date=1 May 2020 |title=Correlation Between Shiftwork, Sleep & Fatigue and Increased Occupational Injuries in a Manufacturing Plant in Pakistan |url=https://aiha-assets.sfo2.digitaloceanspaces.com/AIHA/aihce/2020/Documents/1740.pdf}}</ref>

== Assessment ==
Patients with sleep deprivation may present with complaints of symptoms and signs of insufficient sleep, such as fatigue, sleepiness, drowsy driving, and cognitive difficulties. Sleep insufficiency can easily go unrecognized and undiagnosed unless patients are specifically asked about it by their clinicians.<ref name=":2">{{Cite web | vauthors = Maski K | date = 7 September 2023 | veditors = Scammell TE, Eichler AF | title = Insufficient sleep: Evaluation and management |work = UpToDate |url= https://www.uptodate.com/contents/insufficient-sleep-evaluation-and-management|access-date=2021-01-28 }}</ref>

Several questions are critical in evaluating sleep duration and quality, as well as the cause of sleep deprivation. Sleep patterns (typical bed time or rise time on weekdays and weekends), shift work, and frequency of naps can reveal the direct cause of poor sleep, and quality of sleep should be discussed to rule out any diseases such as [[obstructive sleep apnea]] and [[restless leg syndrome]].<ref name=":2" />

===Sleep diaries===
Sleep diaries are useful in providing detailed information about sleep patterns. They are inexpensive, readily available, and easy to use. The diaries can be as simple as a 24-hour log to note the time of being asleep or can be detailed to include other relevant information.<ref>{{cite journal | vauthors = Carney CE, Buysse DJ, Ancoli-Israel S, Edinger JD, Krystal AD, Lichstein KL, Morin CM | title = The consensus sleep diary: standardizing prospective sleep self-monitoring | journal = Sleep | volume = 35 | issue = 2 | pages = 287–302 | date = February 2012 | pmid = 22294820 | pmc = 3250369 | doi = 10.5665/sleep.1642 }}</ref><ref>{{Cite web|title=Sleep Deprivation: Causes, Symptoms, & Treatment|url=https://www.sleepfoundation.org/sleep-deprivation|access-date=21 January 2021|website=Sleep Foundation|date=3 November 2020|language=en}}</ref>

===Sleep questionnaires===
Sleep questionnaires such as the Sleep Timing Questionnaire (STQ) and Tayside children’s sleep questionnaire can be used instead of sleep diaries if there is any concern for patient adherence.<ref>{{cite journal | vauthors = Monk TH, Buysse DJ, Kennedy KS, Pods JM, DeGrazia JM, Miewald JM | title = Measuring sleep habits without using a diary: the sleep timing questionnaire | journal = Sleep | volume = 26 | issue = 2 | pages = 208–212 | date = March 2003 | pmid = 12683481 | doi = 10.1093/sleep/26.2.208 | doi-access = free }}</ref><ref>{{Cite journal |last1=Rizi |first1=Farid Rajaee |last2=Asgarian |first2=Fatemeh Sadat |date=January 2023 |title=Reliability, validity, and psychometric properties of the Persian version of the Tayside children's sleep questionnaire |journal=Sleep and Biological Rhythms |language=en |volume=21 |issue=1 |pages=97–103 |doi=10.1007/s41105-022-00420-6 |pmid=38468908|pmc=10899986 }}</ref>

Sleep quality can be assessed using the Pittsburgh Sleep Quality Index (PSQI), a self-report questionnaire designed to measure [https://www.tandfonline.com/doi/full/10.1080/10803548.2024.2404326 sleep quality] and disturbances over a one-month period.

===Actigraphy===
[[Actigraphy]] is a useful, objective wrist-worn tool if the validity of self-reported sleep diaries or questionnaires is questionable. Actigraphy works by recording movements and using computerized algorithms to estimate total sleep time, sleep onset latency, the amount of wake after sleep onset, and sleep efficiency. Some devices have light sensors to detect light exposure.<ref>{{Cite web|title=Actigraphy|url=https://stanfordhealthcare.org/medical-tests/s/sleep-disorder-tests/procedures/actigraphy.html|access-date=21 January 2021|website=stanfordhealthcare.org|language=en}}</ref><ref>{{cite journal | vauthors = Morgenthaler T, Alessi C, Friedman L, Owens J, Kapur V, Boehlecke B, Brown T, Chesson A, Coleman J, Lee-Chiong T, Pancer J, Swick TJ | title = Practice parameters for the use of actigraphy in the assessment of sleep and sleep disorders: an update for 2007 | journal = Sleep | volume = 30 | issue = 4 | pages = 519–529 | date = April 2007 | pmid = 17520797 | doi = 10.1093/sleep/30.4.519 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Smith MT, McCrae CS, Cheung J, Martin JL, Harrod CG, Heald JL, Carden KA | title = Use of Actigraphy for the Evaluation of Sleep Disorders and Circadian Rhythm Sleep-Wake Disorders: An American Academy of Sleep Medicine Clinical Practice Guideline | journal = Journal of Clinical Sleep Medicine | volume = 14 | issue = 7 | pages = 1231–1237 | date = July 2018 | pmid = 29991437 | pmc = 6040807 | doi = 10.5664/jcsm.7230 }}</ref><ref>{{cite journal | vauthors = Smith MT, McCrae CS, Cheung J, Martin JL, Harrod CG, Heald JL, Carden KA | title = Use of Actigraphy for the Evaluation of Sleep Disorders and Circadian Rhythm Sleep-Wake Disorders: An American Academy of Sleep Medicine Systematic Review, Meta-Analysis, and GRADE Assessment | journal = Journal of Clinical Sleep Medicine | volume = 14 | issue = 7 | pages = 1209–1230 | date = July 2018 | pmid = 29991438 | pmc = 6040804 | doi = 10.5664/jcsm.7228 }}</ref>

===Wearable devices===
Wearable devices such as [[Fitbit]]s and [[Apple Watch]]es monitor various body signals, including heart rate, skin temperature, and movement, to provide information about sleep patterns. They operate continuously, collecting extensive data which can be used to offer insights on sleep improvement. These devices are user-friendly and have increased awareness about the significance of quality sleep for health.<ref>{{Cite journal |last1=Zambotti |first1=Massimiliano |last2=Cellini |first2=Nicola |last3=Goldstone |first3=Aimee |last4=Colrain |first4=Ian M |last5=Baker C |date=2020 |title=Wearable Sleep Technology in Clinical and Research Settings |journal=Medicine and Science in Sports and Exercise |volume=51 |issue=7 |pages=1538–1557 |doi=10.1249/MSS.0000000000001947 |pmid=30789439 |pmc=6579636 }}</ref>

==Prevention==

Although there are numerous causes of sleep deprivation, there are some fundamental measures that promote quality sleep, as suggested by organizations such as the [[Centers for Disease Control and Prevention]], the [[National Institutes of Health|National Institute of Health]], the [[National Institute on Aging|National Institute of Aging]], and the [[American Academy of Family Physicians]].

===Sleep hygiene===
Historically, sleep hygiene, as first medically defined by Hauri in 1977,<ref name="auto">{{cite journal | vauthors = Irish LA, Kline CE, Gunn HE, Buysse DJ, Hall MH | title = The role of sleep hygiene in promoting public health: A review of empirical evidence | journal = Sleep Medicine Reviews | volume = 22 | pages = 23–36 | date = August 2015 | pmid = 25454674 | pmc = 4400203 | doi = 10.1016/j.smrv.2014.10.001 }}</ref> was the standard for promoting healthy sleep habits, but evidence that has emerged since the 2010s suggests they are ineffective, both for people with insomnia<ref name="AASM-behavioral-therapies-2021">{{cite journal | vauthors = Edinger JD, Arnedt JT, Bertisch SM, Carney CE, Harrington JJ, Lichstein KL, Sateia MJ, Troxel WM, Zhou ES, Kazmi U, Heald JL, Martin JL | title = Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline | journal = Journal of Clinical Sleep Medicine | volume = 17 | issue = 2 | pages = 255–262 | date = February 2021 | pmid = 33164742 | pmc = 7853203 | doi = 10.5664/jcsm.8986 }}</ref> and for people without.<ref name="auto"/> The key is to implement healthier sleep habits, also known as [[sleep hygiene]].<ref>{{Cite web|title=How to Sleep Better|url=https://www.sleepfoundation.org/sleep-hygiene/healthy-sleep-tips|access-date=14 January 2021|website=Sleep Foundation|date=17 April 2009|language=en}}</ref>

Sleep hygiene recommendations include
* setting a fixed sleep schedule
* taking naps with caution
* maintaining a sleep environment that promotes sleep (cool temperature, limited exposure to light and noise)
* comfortable mattresses and pillows
* exercising daily
* avoiding alcohol, cigarettes and [[caffeine]]
* avoiding heavy meals in the evening
* winding down and avoiding electronic use or physical activities close to bedtime
* getting out of bed if unable to fall asleep.<ref>{{Cite web|url=https://www.cdc.gov/sleep/about_sleep/sleep_hygiene.html|title=CDC - Sleep Hygiene Tips - Sleep and Sleep Disorders|date=13 February 2019|website=www.cdc.gov|language=en-us|access-date=21 April 2020}}</ref>

===CBT===
For long-term involuntary sleep deprivation, [[cognitive behavioral therapy]] for insomnia (CBT-i) is recommended as a first-line treatment after the exclusion of a physical diagnosis (e.g., sleep apnea).<ref name="AASM-behavioral-therapies-2021" />

CBT-i contains five different components:
* cognitive therapy
* stimulus control
* sleep restriction
* sleep hygiene
* relaxation.

As this approach has minimal adverse effects and long-term benefits, it is often preferred to (chronic) drug therapy.<ref name="Trauer 191">{{cite journal | vauthors = Trauer JM, Qian MY, Doyle JS, Rajaratnam SM, Cunnington D | title = Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis | journal = Annals of Internal Medicine | volume = 163 | issue = 3 | pages = 191–204 | date = August 2015 | pmid = 26054060 | doi = 10.7326/M14-2841 }}</ref>

==Management==
===Measures to increase alertness===
There are several strategies that help increase alertness and counteract the effects of sleep deprivation.
* [[Caffeine]] is often used over short periods to boost wakefulness when acute sleep deprivation is experienced; however, caffeine is less effective if taken routinely.<ref>{{Cite web|url = http://www.aasmnet.org/resources/factsheets/sleepdeprivation.pdf|title = Sleep Deprivation|date = 2008|access-date = 25 March 2015|website = American Academy of Sleep Medicine|url-status = live|archive-url = https://web.archive.org/web/20150226011724/http://www.aasmnet.org/Resources/FactSheets/SleepDeprivation.pdf|archive-date = 26 February 2015|df = dmy-all}}</ref>

Other strategies recommended by the American Academy of Sleep Medicine include
* prophylactic sleep before deprivation,
* naps,
* other stimulants,
and combinations thereof.

However, the American Academy of Sleep Medicine has said that the only sure and safe way to combat sleep deprivation is to increase nightly sleep time.<ref name="SleepFactSheet">{{cite web |work=American Academy of Sleep Medicine |title=Sleep Deprivation Fact Sheet |url=http://www.aasmnet.org/Resources/FactSheets/SleepDeprivation.pdf |date=2 December 2009 |url-status=live |archive-url=https://web.archive.org/web/20150226011724/http://www.aasmnet.org/Resources/FactSheets/SleepDeprivation.pdf |archive-date=26 February 2015 }}</ref>


==Uses==
==Uses==
===Scientific study===
In science, sleep deprivation (of rodents, e.g.) is used in order to study the function(s) of [[sleep]] and the biological mechanisms underlying the effects of sleep deprivation.


===Treating depression===
Some sleep deprivation techniques are as follows:
{{Further|Sleep Deprivation Therapy}}
* gentle handling (often require [[polysomnography]]): during the sleep deprivation period, the animal and its polygraph record are continuously observed; when the animal displays sleep electrophysiological signals or assumes a sleep posture, it is given objects to play with and activated by acoustic and if necessary tactile stimuli.<ref>{{cite journal | pmid = 1858947 | title = Sleep deprivation in rats: effects on EEG power spectra, vigilance states, and cortical temperature | author = P. Franken, D. J. Dijk, I. Tobler and A. A. Borbely | journal = [[Am J Physiol Regul Integr Comp Physiol]] | volume = 261 | pages = R198-R208 | year = 1991}}</ref> Although subjective,<ref>{{cite journal | title = Effects of method, duration, and sleep stage on rebounds from sleep deprivation in the rat | author = Rechtschaffen A, Bergmann BM, Gilliland MA, Bauer K. | pmid = 9989363 | journal = [[Sleep (journal)|Sleep]] | year = 1999 | volume = 22 | issue = 1 | pages = 11-31}}</ref> this technique is used for total sleep deprivation as well as [[Rapid eye movement sleep|REM]] or [[NREM]] sleep deprivation.
Studies show that sleep restriction has some potential for treating [[Major depressive disorder|depression]].<ref name="Sleep and depression review"/> Those with depression tend to have earlier occurrences of REM sleep with an increased number of rapid eye movements; therefore, monitoring patients' EEG and awakening them during occurrences of REM sleep appear to have a [[therapeutic effect]], alleviating depressive symptoms.<ref>{{Cite book| vauthors = Carlson N |title=Physiology of Behavior|publisher=Pearson|year=2013|isbn=978-0-205-23939-9|edition=11th|location=Boston|pages=578–579}}</ref> This kind of treatment is known as [[wake therapy]]. Although as many as 60% of patients show an immediate recovery when sleep-deprived, most patients relapse the following night. The effect has been shown to be linked to an increase in [[brain-derived neurotrophic factor]] (BDNF).<ref>{{cite journal | vauthors = Gorgulu Y, Caliyurt O | title = Rapid antidepressant effects of sleep deprivation therapy correlates with serum BDNF changes in major depression | journal = Brain Research Bulletin | volume = 80 | issue = 3 | pages = 158–162 | date = September 2009 | pmid = 19576267 | doi = 10.1016/j.brainresbull.2009.06.016 }}</ref> A comprehensive evaluation of the human [[metabolome]] in sleep deprivation in 2014 found that 27 metabolites are increased after 24 waking hours and suggested [[serotonin]], tryptophan, and taurine may contribute to the antidepressive effect.<ref>{{cite journal | vauthors = Davies SK, Ang JE, Revell VL, Holmes B, Mann A, Robertson FP, Cui N, Middleton B, Ackermann K, Kayser M, Thumser AE, Raynaud FI, Skene DJ | title = Effect of sleep deprivation on the human metabolome | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 111 | issue = 29 | pages = 10761–10766 | date = July 2014 | pmid = 25002497 | pmc = 4115565 | doi = 10.1073/pnas.1402663111 | bibcode = 2014PNAS..11110761D | doi-access = free }}</ref>
[[Image:Sleep-deprivation-flowerpot-technique-jepoirrier.jpg|thumb|Rodent sleep deprivation by the single platform ("flower pot") technique]]
* single platform: probably one of the first scientific methods (see [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=Abstract&list_uids=14186938 Jouvet, 1964] for cats<ref>{{cite journal | journal = [[Science (journal)|Science]] | year = 1965 | volume = 150 | issue = 3701 | pages = 1318 - 1319 | doi = 10.1126/science.150.3701.1318 | title = Sleep: Changes in Threshold to Electroconvulsive Shock in Rats after Deprivation of "Paradoxical" Phase | author = Harry B. Cohen and William C. Dement}}</ref> and for rodents). During the sleep deprivation period, the animal is placed on an inverted flower pot whose bottom diameter is small relative to the animal size (usually 7 cm for adult rats); the pot is placed in a large tub filled with water to within 1 cm of the flower pot bottom. The animal is able to rest on the pot and is even able to get NREM sleep. But at the onset of REM sleep, with its ensuing muscular relaxation, it would either fall into the water and clamber back to its pot or would get its nose wet enough to waken it. So this technique is used only for REM sleep deprivation.
* multiple platform: in order to reduce the elevated stress response induced by the single platform method,<ref>{{cite journal | journal = [[Physiology & Behavior]] | doi = 10.1016/0031-9384(81)90250-X | title = Paradoxical sleep deprivation and locomotor activity in rats | author = Z. J. M. van Hulzen and A. M. L. Coenen | volume = 27 | issue = 4 | year = 1981 | pages = 741 - 744}}</ref> developed this technique in which the animal is placed into a large tank containing multiple platforms, thus eliminating the movement restriction experienced in the single platform. This technique is also used only for REM sleep deprivation.
* modified multiple platform: modification of the multiple platform method where several animals together get the sleep deprivation (Nunes and Tufik, 1994).
* pendulum: animals are prevented from entering into PS by allowing them to sleep for only brief periods of time. This is accomplished by an apparatus which moves the animals' cages backwards and forwards like a pendulum. At the extremes of the motion postural imbalance is produced in the animals forcing them to walk downwards to the other side of their cages.<ref>{{cite journal | journal = [[Physiology & Behavior]] | doi = 10.1016/0031-9384(80)90298-X | title = The pendulum technique for paradoxical sleep deprivation in rats | author = Z. J. M. van Hulzen and A. M. L. Coenen | volume = 25 | issue = 6 | year = 1980 | pages = 807-811}}</ref>


The incidence of relapse can be decreased by combining sleep deprivation with medication or a combination of [[light therapy]] and phase advance (going to bed substantially earlier than one's normal time).<ref name="Ncbi">{{cite journal | vauthors = Wirz-Justice A, Van den Hoofdakker RH | title = Sleep deprivation in depression: what do we know, where do we go? | journal = Biological Psychiatry | volume = 46 | issue = 4 | pages = 445–453 | date = August 1999 | pmid = 10459393 | doi = 10.1016/S0006-3223(99)00125-0 }}</ref><ref>{{cite journal | vauthors = Wirz-Justice A, Benedetti F, Berger M, Lam RW, Martiny K, Terman M, Wu JC | title = Chronotherapeutics (light and wake therapy) in affective disorders | journal = Psychological Medicine | volume = 35 | issue = 7 | pages = 939–944 | date = July 2005 | pmid = 16045060 | doi = 10.1017/S003329170500437X | doi-broken-date = 1 November 2024 | doi-access = free }}</ref> Many [[tricyclic antidepressants]] suppress REM sleep, providing additional evidence for a link between [[mood (psychology)|mood]] and sleep.<ref name="SleepDepEmedicinehealth">{{cite web | url = http://www.emedicinehealth.com/articles/42677-5.asp | title = Disorders That Disrupt Sleep (Parasomnias) | archive-url = https://web.archive.org/web/20051222202250/http://www.emedicinehealth.com/articles/42677-5.asp| archive-date=22 December 2005 | work = eMedicineHealth }}</ref> Similarly, [[tranylcypromine]] has been shown to completely suppress REM sleep at adequate doses.
===Torture===


Sleep deprivation has been used as a [[#Treating depression|treatment for depression]].<ref name="REM deprivation in healthy people"/><ref name="Sleep and depression review"/>
<br />
Sleep deprivation is used as an interrogation technique (for example, in [[Pinochet]]-era [[Chile]]{{Fact|date=April 2008}}, the Soviet Union, and by [[coalition forces]] in Afghanistan and Iraq).<ref name="SleepTorture">{{cite journal | first = | last = | | title =http://www.smh.com.au/news/National/Sleep-deprivation-is-torture-Amnesty/2006/10/03/1159641317450.html | year = }}</ref> Interrogation victims are kept awake for several days; when they are finally allowed to fall asleep, they are suddenly awakened and questioned. [[Menachem Begin]], the Israeli prime minister from 1977-83 described his experience of sleep deprivation when a prisoner of the KGB in Russia as follows:
{{quote|In the head of the interrogated prisoner, a haze begins to form. His spirit is wearied to death, his legs are unsteady, and he has one sole desire: to sleep... Anyone who has experienced this desire knows that not even hunger and thirst are comparable with it.}}
In 2006, Australian Federal Attorney-General [[Philip Ruddock]] argued that sleep deprivation does not constitute torture. <ref name="SleepTorture2">{{cite journal | first = | last = | | title = http://www.abc.net.au/pm/content/2006/s1754821.htm | year = }}</ref><ref name="SleepTorture3">{{cite journal | first = | last = | | title =http://au.news.yahoo.com/061003/21/10rum.html | year = }}</ref> In rats, prolonged, complete sleep deprivation increases both food intake and energy expenditure, leading to weight loss and, ultimately, death. <ref name="RatExperiments">{{cite journal | first = | last = | | title = http://medicine.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pmed.0010062 | year = }}</ref> Nicole Bieske, a spokeswoman for Amnesty International Australia, has stated, "At the very least, [sleep deprivation] is cruel, inhumane and degrading. If used for prolonged periods of time it is torture."<ref name="SleepTorture">{{cite journal | first = | last = | | title =http://www.smh.com.au/news/National/Sleep-deprivation-is-torture-Amnesty/2006/10/03/1159641317450.html | year = }}</ref>


=== Treating insomnia ===
===Treatment for depression===
Sleep deprivation can be implemented for a short period of time in the treatment of [[insomnia]]. Some common sleep disorders have been shown to respond to [[cognitive behavioral therapy for insomnia]]. Cognitive behavioral therapy for insomnia is a multicomponent process that is composed of stimulus control therapy, sleep restriction therapy (SRT), and sleep hygiene therapy.<ref name=":3">{{Citation | vauthors = Perlis M, Gehrman P |title=Psychophysiological Insomnia |date=2013 |encyclopedia=Encyclopedia of Sleep |pages=203–204 |publisher=Elsevier |doi=10.1016/b978-0-12-378610-4.00177-7 |isbn=978-0-12-378611-1 }}</ref> One of the components is a controlled regime of "sleep restriction" in order to restore the [[Homeostasis|homeostatic]] drive to sleep and encourage normal "sleep efficiency".<ref name="auto2">{{cite journal | vauthors = Miller CB, Espie CA, Epstein DR, Friedman L, Morin CM, Pigeon WR, Spielman AJ, Kyle SD | title = The evidence base of sleep restriction therapy for treating insomnia disorder | journal = Sleep Medicine Reviews | volume = 18 | issue = 5 | pages = 415–424 | date = October 2014 | pmid = 24629826 | doi = 10.1016/j.smrv.2014.01.006 }}</ref> Stimulus control therapy is intended to limit behaviors intended to condition the body to sleep while in bed.<ref name=":3"/> The main goal of stimulus control and [[Cognitive behavioral therapy for insomnia#Sleep restriction therapy|sleep restriction therapy]] is to create an association between bed and sleep. Although sleep restriction therapy shows efficacy when applied as an element of cognitive-behavioral therapy, its efficacy is yet to be proven when used alone.<ref name="auto2"/><ref name="Trauer 191" /> Sleep hygiene therapy is intended to help patients develop and maintain good sleeping habits. Sleep hygiene therapy is not helpful, however, when used as a monotherapy without the pairing of stimulus control therapy and sleep restriction therapy.<ref name=":3"/><ref name="AASM-behavioral-therapies-2021" /> Light stimulation affects the supraoptic nucleus of the hypothalamus, controlling circadian rhythm and inhibiting the secretion of melatonin from the pineal gland. Light therapy can improve sleep quality, improve sleep efficiency, and extend sleep duration by helping to establish and consolidate regular sleep-wake cycles. Light therapy is a natural, simple, low-cost treatment that does not lead to residual effects or tolerance. Adverse reactions include headaches, eye fatigue, and even mania.<ref>{{Cite journal |date=2017-06-27 |title=中国失眠症诊断和治疗指南 | trans-title = Guidelines for Diagnosis and Treatment of Insomnia in China |language=zh |journal=National Medical Journal of China |volume=97 |issue=24 |pages=1844–1856 |doi=10.3760/cma.j.issn.0376-2491.2017.24.002 }}</ref>
Recent studies show sleep deprivation has some potential in the treatment of depression. About 60% of patients, when sleep-deprived, show immediate recovery, with most relapsing the following night. The incidence of relapse can be decreased by combining sleep deprivation with medication <ref name="Ncbi">{{cite journal | first = | last = | | title = http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10459393&dopt=Abstract| year = }}</ref>. Incidentally, many [[tricyclic antidepressants]] happen to suppress REM sleep, providing additional evidence for a link between mood and sleep <ref name="SleepDepEmedicinehealth">{{cite journal | first = | last = | | title =http://www.emedicinehealth.com/articles/42677-5.asp | year = }}</ref>. Similarly, [[tranylcypromine]] has been shown to completely suppress REM sleep at adequate doses.


In addition to the cognitive behavioral treatment of insomnia, there are also generally four approaches to treating insomnia medically. These are through the use of barbiturates, [[benzodiazepine]]s, and benzodiazepine receptor agonists. Barbiturates are not considered to be a primary source of treatment due to the fact that they have a low therapeutic index, while melatonin agonists are shown to have a higher therapeutic index.<ref name=":3"/>
===Voluntary===
Sleep deprivation may sometimes be intentionally induced for various reasons. For example, it may be induced as a form of recreation, entertainment or to provide a legal "high" without using drugs.{{Fact|date=August 2007}} Vivid hallucinations, heightened senses and a feeling of incredible creativity (common effects of illicit drugs) may occur after 48 hours (or less) of being in a state of sleeplessness. There is even a history of sleep deprivation being used by different schools of religious mystics as a form of asceticism or to heighten spiritual awareness. In particular, the early desert monks of the Christian Church during the fourth and fifth centuries were known to deny themselves sleep. [[Coffee]] owes much of its spread in popularity through use by Muslim mystics in all-night devotions.{{Fact|date=October 2007}}


=== Military uses ===
Sleep deprivation has sometimes been self-imposed to achieve personal notoriety in the context of [[World record|record-breaking stunts]]. One such record belonged to [[Randy Gardner (record holder)|Randy Gardner]], who stayed awake for 264 hours (eleven days even). Lt. Cmdr. John J. Ross of the US Navy Medical Neuropsychiatric Research Unit later published an account of this event, which became well known among sleep-deprivation researchers.<!-- cite available in target link, but check for yourself before aping it here, as I'm not 100% confident that this claim is stated properly -->


====Military training====
In [[2004]], a controversial British [[reality show]] called ''[[Shattered]]'' challenged contestants to go 7 days without sleep.
Sleep deprivation has become hardwired into the military culture. It is prevalent in the entire force and especially severe for servicemembers deployed in high-conflict environments.<ref name=":5">{{Cite journal | vauthors = Irving D |date=2017-03-01 |title=The Costs of Poor Sleep Are Staggering |url=https://www.rand.org/pubs/articles/2017/the-costs-of-poor-sleep-are-staggering.html |website=RAND}}</ref><ref name=":6">{{Cite book | vauthors = Troxel W, Shih R, Pedersen E, Geyer L, Fisher M, Griffin BA, Haas A, Kurz J, Steinberg P |date=2015 |title=Improving Sleep Health for U.S. Servicemembers: Policies, Programs, Barriers to Implementation, and Recommendations |doi=10.7249/rb9824 |isbn=978-0-8330-8851-2}}</ref>


Sleep deprivation has been used by the [[military]] in training programs to prepare personnel for combat experiences when proper sleep schedules are not realistic. Sleep deprivation is used to create a different schedule pattern that is beyond a typical 24-hour day. Sleep deprivation is pivotal in training games such as "Keep in Memory" exercises, where personnel practice memorizing everything they can while under intense stress physically and mentally and being able to describe in as much detail as they can remember of what they remember seeing days later. Sleep deprivation is used in training to create soldiers who are used to only going off of a few hours or minutes of sleep randomly when available.{{Citation needed|date=December 2023}}
==Causes and treatments==
===School===
In the [[United States]], and in many other countries, sleep deprivation is common among students.<ref name="SleepDepSchool">{{cite journal | first = | last = | | title = http://sleepdisorders.about.com/cs/sleepdeprivation/a/backtoschool.htm| year = }}</ref>. School aged children should be getting between 8.5 and 9.25 hours of sleep<ref name="SleepReqirementsByAge">{{cite journal | first = | last = | | title = http://www.drpaul.com/behaviour/sleep.html| year = }}</ref> but many do not. A [[National Sleep Foundation]] survey found that college/university-aged students get an average of 6.8 hours of sleep each night.<ref name="SleepDepAb">{{cite journal | first = | last = | | title = http://sleepdisorders.about.com/cs/sleepdeprivation/a/depstudents.htm| year = }}</ref> Partying, working, and a full class load are main contributing factors to sleep deprivation among college students.<ref name="College Students and Sleep Deprivation">{{cite journal | first = | last = | | title = http://www.sleep-deprivation.com/articles/causes-of-sleep-deprivation/students-and-sleep.php| year = 2008}}</ref> Sleep deprivation is common in college freshmen especially, as they adjust to the stress and social activities of college life. A study performed by the Department of Psychology at the National Chung-Cheng University in Taiwan concluded that freshmen received the shortest amount of sleep during the week.<ref name="Sleep patterns in college students; Gender and grade differences">{{cite journal | first = Ling-Ling| last = Tsai | first = Sheng-Ping | last = Li| | title = http://www.websciences.org/cftemplate/NAPS/archives/indiv.cfm?ID=20041266| year = 2008 }}</ref>. Sleep deprivation has also been linked to the feared "freshman fifteen," as staying up later often leads to an increased food intake which ultimately causes weight gain.<ref name="College Students and Sleep Deprivation">{{cite journal | first = | last = | | title = http://www.sleep-deprivation.com/articles/causes-of-sleep-deprivation/students-and-sleep.php| year = 2008}}</ref>. Students get more sleep each night in the summer than during the school year,<ref name="SleepDepSummer">{{cite journal | first = | last = | | title = http://www.healthysleeping.com/focus_article.asp?f=sleep_disorders&c=sleep_backtoschool&b=healthysleeping&spg=SHO| year = }}</ref> and one in four US high school students admit to falling asleep in class at least once a week.<ref name="SleepDepAbcNews">{{cite journal | first = | last = | | title =http://abcnews.go.com/US/wireStory?id=1775003 | year = }}</ref>. Research has indicated that teenage children have a variation in their [[circadian rhythm|circadian]] cycle that delays sleep past the normal time for adults. Since school schedules are based around the adult workday, it is not surprising that students have difficulty obtaining adequate sleep. In 1997 the [[University of Minnesota]] did research that compared students who went to school at 7:15 and those who went to school at 8:40. They found that students who went to school at 8:40 got higher grades and more sleep on the weekdays.<ref name="SleepDepReport">{{cite journal | first = | last = | | title = http://www.apa.org/monitor/oct01/sleepteen.html| year = }}</ref>


DARPA initiated sleep research to create a highly resilient soldier capable of sustaining extremely prolonged wakefulness, inspired by the white-crowned sparrow's week-long sleeplessness during migration, at a time when it was not understood that [[Unihemispheric slow-wave sleep|migration birds actually slept with half of their brain]]. This pursuit aimed both to produce a "super soldier" able "to go for a minimum of seven days without sleep, and in the longer term perhaps at least double that time frame, while preserving high levels of mental and physical performance", and to enhance productivity in sleep-deprived personnel. Military experiments on sleep have been conducted on combatants and prisoners, such as those in Guantánamo, where controlled lighting is combined with torture techniques to manipulate sensory experiences. Crary highlights how constant illumination and the removal of day-night distinctions create what he defines as a "time of indifference," utilizing light management as a form of psychological control.<ref>{{Cite journal | vauthors = Eriksson M, Juárez G |date=2017 |title=The Biopolitics of Melanopic Illuminance |url=http://www.scapegoatjournal.org/docs/10/14.pdf |journal=Scapegoat |issue=10 |archive-url=https://web.archive.org/web/20210905132205/http://www.scapegoatjournal.org/docs/10/14.pdf |archive-date=2021-09-05}}</ref><ref>{{Cite book | vauthors = Crary J |title=24/7: late capitalism and the ends of sleep |date=2014 |publisher=Verso |isbn=978-1-78168-310-1 |edition= |location=London}}</ref>
===Prevention of effects in soldiers===
Since sleep deprivation is a fact of modern combat, the [[U.S. Army]], through [[DARPA]], has a "Preventing Sleep Deprivation Program", which has the goal to prevent the harmful effects of sleep deprivation and provide methods for recovery of function with particular emphasis on cognitive and psychomotor impairments. Their efforts include new pharmaceuticals that enhance neural transmission, [[nutraceutical]]s that promote [[neurogenesis]], cognitive training, and devices such as [[transcranial magnetic stimulation]].


However, studies have since evaluated the impact of the sleep deprivation imprint on the military culture. Personnel surveys reveal common challenges such as inadequate sleep, fatigue, and impaired daytime functioning, impacting operational effectiveness and post-deployment reintegration. These sleep issues elevate the risk of severe mental health disorders, including PTSD and depression. Early intervention is crucial. Though promising, implementing cognitive-behavioral and imagery-rehearsal therapies for insomnia remains a challenge. Several high-profile military accidents caused in part or fully by sleep deprivation of personnel have been documented. The military has prioritized sleep education, with recent Army guidelines equating sleep importance to nutrition and exercise. The Navy, particularly influenced by retired Captain John Cordle, has actively experimented with watch schedules to align shipboard life with sailors' circadian needs, leading to improved sleep patterns, especially in submarines, supported by ongoing research efforts at the Naval Postgraduate School. Watch schedules with longer and more reliable resting intervals are nowadays the norm on U.S. submarines and a recommended option for surface ships.<ref name=":5" /><ref name=":6" />
Militaries of several countries, including the US, the UK, Pakistan and France, have been exploring the use of a drug called [[modafinil]] (sold as the brand Provigil in the United States), which has prevented negative effects of sleep deprivation. Although modafinil is not a typical stimulant, it eliminates fatigue, promotes wakefulness, and improves alertness; it was initially developed for sufferers of [[narcolepsy]].


In addition to sleep deprivation, circadian misalignment, as commonly experienced by submarine crews, causes several long-term health issues and a decrease in cognitive performance.<ref>{{cite journal | vauthors = Guo JH, Ma XH, Ma H, Zhang Y, Tian ZQ, Wang X, Shao YC | title = Circadian misalignment on submarines and other non-24-h environments - from research to application | journal = Military Medical Research | volume = 7 | issue = 1 | pages = 39 | date = August 2020 | pmid = 32814592 | pmc = 7437048 | doi = 10.1186/s40779-020-00268-2 | doi-access = free }}</ref>
==See also==
*[[Microsleep]]
*[[Insomnia]]
*[[Narcolepsy]]
*[[Fatigue (medical)|Fatigue]]
*[[Sleep debt]]
*[[Polyphasic sleep]]


====To facilitate abusive control====
==References==
Sleep deprivation can be used to disorient [[abuse]] victims to help set them up for [[abusive power and control|abusive control]].<ref>{{Cite web |title=Sleep Deprivation Used as Abuse Tactic |url=https://www.domesticshelters.org/articles/identifying-abuse/sleep-deprivation-as-abuse |access-date=2023-01-31 |website=DomesticShelters.org |language=en-US}}</ref><ref>{{Cite web |url=https://federation.edu.au/staff/working-at-feduni/feduni-against-violence/family-and-domestic-violence?a=282376 |title=Family and Domestic Violence - Healthy Work Healthy Living Tip Sheet |access-date=21 January 2019 |archive-date=19 May 2019 |archive-url=https://web.archive.org/web/20190519200619/https://federation.edu.au/staff/working-at-feduni/feduni-against-violence/family-and-domestic-violence?a=282376 |url-status=dead }}</ref>
{{reflist|2}}
<div class="references-small">
*[http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=neurosci.section.1951 Why Do Humans and Many Other Animals Sleep?]
*[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10459393&dopt=Abstract Microsleep during partial sleep deprivation in depression.]
*[http://www.emedicinehealth.com/articles/42677-5.asp Sleep Disorder Treatments]
</div>


====Interrogation====
==External links==
Sleep deprivation can be used as a means of interrogation, which has resulted in court trials over whether or not the technique is a form of [[torture]].<ref>{{cite news|date=2 October 2009|title=Binyam Mohamed torture appeal lost by UK government...|work=BBC News|url=http://news.bbc.co.uk/2/hi/uk_news/8507852.stm|url-status=live|archive-url=https://web.archive.org/web/20100211025746/http://news.bbc.co.uk/2/hi/uk_news/8507852.stm|archive-date=11 February 2010}}</ref>
* [http://www.sleepfoundation.org/_content/hottopics/2005_summary_of_findings.pdf National Sleep Foundation 2005 Sleep in America Poll] (from the [http://www.sleepfoundation.org National Sleep Foundation])

* [http://health.ucsd.edu/news/2000_02_09_Sleep.html Brain activity is visibly altered following sleep deprivation]
Under one interrogation technique, a subject might be kept awake for several days and, when finally allowed to fall asleep, suddenly awakened and questioned. [[Menachem Begin]], the Prime Minister of [[Israel]] from 1977 to 1983, described his experience of sleep deprivation as a prisoner of the [[NKVD]] in the Soviet Union as follows:
*[http://www.blackwell-synergy.com/links/doi/10.1046/j.1365-2265.1999.00763.x Sleep deprivation effects on the activity of the hypothalamic spituitary adrenal and growth axes: potential clinical implications], by Alexandros N. Vgontzas, George Mastorakos, Edward O. Bixler, Anthony Kales, Philip W. Gold & George P. Chrousos
{{Blockquote|In the head of the interrogated prisoner, a haze begins to form. His spirit is wearied to death, his legs are unsteady, and he has one sole desire: to sleep... Anyone who has experienced this desire knows that not even hunger and thirst are comparable with it.<ref>{{cite book | vauthors = Begin M |title=White nights: the story of a prisoner in Russia |publisher=Harper & Row |location=San Francisco |year=1979 |isbn=978-0-06-010289-0 |url-access=registration |url=https://archive.org/details/whitenightsstory00begi }}</ref>}}
* [http://www.sleepfoundation.org/site/c.huIXKjM0IxF/b.2453615/apps/nl/content3.asp?content_id={E87FBE34-71FC-4892-A5D0-40FD978BEEBB}&notoc=1 ''How Much Sleep Do You Really Need?'']

* [http://www.thewhitenoisealbum.com/sleepdebtcalculator.html Calculate your Sleep Debt with this Sleep Debt Calculator]
Sleep deprivation was one of the [[five techniques]] used by the British government in the 1970s. The [[European Court of Human Rights]] ruled that the five techniques "did not occasion suffering of the particular intensity and cruelty implied by the word torture ... [but] amounted to a practice of [[inhuman or degrading treatment|inhuman and degrading treatment]]", in breach of the [[European Convention on Human Rights]].<ref name="Ireland v. UK-102">{{Cite web |title=HUDOC - European Court of Human Rights |url=https://hudoc.echr.coe.int/eng |access-date=2023-01-31 |website=hudoc.echr.coe.int}}</ref>
* [http://groups.google.com/group/all-nighter Sleep deprivation & all-nighters on Google Groups]

* [http://www.sleeplessinpenzance.co.uk/ World record attempt]
The [[United States Justice Department]] released four memos in August 2002 describing interrogation techniques used by the [[Central Intelligence Agency]]. They first described 10 techniques used in the interrogation of [[Abu Zubaydah]], described as a terrorist logistics specialist, including sleep deprivation. Memos signed by [[Steven G. Bradbury]] in May 2005 claimed that forced sleep deprivation for up to 180 hours ({{frac|7|1|2}} days)<ref name="latimes2009-04-17">{{cite news| vauthors = Miller G, Meyer J |date=17 April 2009|title=Obama assures intelligence officials they won't be prosecuted over interrogations|newspaper=[[Los Angeles Times]]|url=https://www.latimes.com/archives/la-xpm-2009-apr-17-na-interrogation17-story.html|access-date=10 July 2016}}</ref><ref name="memo10May2005-1">{{cite web| vauthors = Bradbury SG |date=10 May 2005|title=Memorandum for John Rizzo |url= http://media.luxmedia.com/aclu/olc_05102005_bradbury46pg.pdf |url-status=dead|archive-url=https://web.archive.org/web/20111106150408/http://media.luxmedia.com/aclu/olc_05102005_bradbury46pg.pdf|archive-date=6 November 2011|access-date=24 October 2011|publisher=ACLU|page=14}}</ref> by shackling a diapered prisoner to the ceiling did not constitute torture,<ref name="time">{{cite news| vauthors = Scherer M |date=21 April 2009|title=Scientists Claim CIA Misused Work on Sleep Deprivation|newspaper=[[Time (magazine)|Time]]|url=http://content.time.com/time/nation/article/0,8599,1892897,00.html|access-date=2 February 2017}}</ref> nor did the combination of multiple interrogation methods (including sleep deprivation) constitute torture under United States law.<ref name="Explaining and Authorizing Specific Interrogation Techniques">{{cite news|date=17 April 2009|title=Explaining and Authorizing Specific Interrogation Techniques|work=The New York Times|url=https://www.nytimes.com/interactive/2009/04/17/us/politics/20090417-interrogation-techniques.html|url-status=live|archive-url=https://web.archive.org/web/20171019152619/http://www.nytimes.com/interactive/2009/04/17/us/politics/20090417-interrogation-techniques.html|archive-date=19 October 2017}}</ref><ref name="OPR">{{cite report|url=https://www.aclu.org/files/pdfs/natsec/opr20100219/20090729_OPR_Final_Report_with_20100719_declassifications.pdf|title=Investigation into the Office of Legal Counsel's Memoranda Concerning Issues Relating to the Central Intelligence Agency's Use of "Enhanced Interrogation Techniques" on Suspected Terrorists|author=Department of Justice Office of Professional Responsibility|date=29 July 2009|publisher=[[United States Department of Justice]]|pages=133–138|author-link=Office of Professional Responsibility|access-date=29 May 2017}}</ref> These memoranda were repudiated and withdrawn during the first months of the Obama administration.<ref name="latimes2009-04-17" />
* [http://www.studiobar.com/livevideo/ Live webcam of world record attempt]

The question of the extreme use of sleep deprivation as torture has advocates on both sides of the issue. In 2006, Australian Federal Attorney-General [[Philip Ruddock]] argued that sleep deprivation does not constitute torture.<ref name="SleepTorture2">{{cite news| vauthors = Hassan T |date=3 October 2006|title=Sleep deprivation remains red-hot question|work=PM|publisher=abc.net.au|url=http://www.abc.net.au/pm/content/2006/s1754821.htm|url-status=live|archive-url=https://web.archive.org/web/20071011211903/http://abc.net.au/pm/content/2006/s1754821.htm|archive-date=11 October 2007}}</ref> Nicole Bieske, a spokeswoman for Amnesty International Australia, has stated the opinion of her organization as follows: "At the very least, sleep deprivation is cruel, inhumane and degrading. If used for prolonged periods of time it is torture."<ref name="SleepTorture">{{cite news|date=3 October 2006|title=Sleep deprivation is torture: Amnesty|work=The Sydney Morning Herald|agency=AAP|url=https://www.smh.com.au/news/National/Sleep-deprivation-is-torture-Amnesty/2006/10/03/1159641317450.html|url-status=live|archive-url=https://web.archive.org/web/20071027141433/http://www.smh.com.au/news/National/Sleep-deprivation-is-torture-Amnesty/2006/10/03/1159641317450.html|archive-date=27 October 2007}}</ref>

== Changes in American sleep habits ==
{{globalize|section|date=December 2010}}
''[[National Geographic Magazine]]'' has reported that the demands of work, social activities, and the availability of 24-hour home entertainment and Internet access have caused people to sleep less now than in premodern times.<ref>{{Cite web |title=National Geographic |url=https://www.nationalgeographic.com/ |access-date=2023-01-31 |website=National Geographic |language=en}}</ref> ''[[USA Today]]'' reported in 2007 that most adults in the USA get about an hour less than the average sleep time 40 years ago.<ref>{{cite news | url=https://www.usatoday.com/news/health/2007-11-25-sleep-deficit_N.htm | work=USA Today | vauthors = Fackelmann K | title=Study: Sleep deficit may be impossible to make up | date=25 November 2007 | url-status=live | archive-url=https://web.archive.org/web/20120628121051/http://www.usatoday.com/news/health/2007-11-25-sleep-deficit_N.htm | archive-date=28 June 2012 | df=dmy-all }}</ref>

Other researchers have questioned these claims. A 2004 editorial in the journal ''[[Sleep (journal)|Sleep]]'' stated that, according to the available data, the average number of hours of sleep in a 24-hour period has not changed significantly in recent decades among adults. Furthermore, the editorial suggests that there is a range of normal sleep time required by healthy adults, and many indicators used to suggest chronic sleepiness among the population as a whole do not stand up to scientific scrutiny.<ref>{{cite journal | vauthors = Horne J | title = Is there a sleep debt? | journal = Sleep | volume = 27 | issue = 6 | pages = 1047–1049 | date = September 2004 | pmid = 15532195 }}</ref>

A comparison of data collected from the [[Bureau of Labor Statistics]]' American Time Use Survey from 1965 to 1985 and 1998–2001 has been used to show that the median amount of sleep, napping, and resting done by the average adult American has changed by less than 0.7%, from a median of 482 minutes per day from 1965 through 1985 to 479 minutes per day from 1998 through 2001.<ref>{{cite web|url=http://www.popcenter.umd.edu/sdaweb/glaser/Doc/GLAS.htm|title=National Time Use Studies (1965–1985)|work=umd.edu|url-status=live|archive-url=https://web.archive.org/web/20060907204651/http://www.popcenter.umd.edu/sdaweb/glaser/Doc/GLAS.htm|archive-date=7 September 2006}}</ref><ref>{{cite web|url=http://www.popcenter.umd.edu/sdaweb/diary9801/Doc/Diar.htm|title=National Time Use Studies (1998 - 2001)|work=umd.edu|url-status=live|archive-url=https://web.archive.org/web/20060907204005/http://www.popcenter.umd.edu/sdaweb/diary9801/Doc/Diar.htm|archive-date=7 September 2006}}</ref>

==Longest periods without sleep==
[[Randy Gardner (record holder)|Randy Gardner]] holds the scientifically documented record for the longest period of time a human being has intentionally gone without sleep not using [[stimulant]]s of any kind. Gardner stayed awake for 264 hours (11 days), breaking the previous record of 260 hours held by [[Tom Rounds]] of [[Honolulu]].<ref name="Coren">{{cite journal| vauthors = Coren S |date=1 March 1998|title=Sleep Deprivation, Psychosis and Mental Efficiency|url=http://www.psychiatrictimes.com/display/article/10168/54471|url-status=live|journal=Psychiatric Times|volume=15|issue=3|archive-url=https://web.archive.org/web/20090904142025/http://www.psychiatrictimes.com/display/article/10168/54471|archive-date=4 September 2009|access-date=25 November 2009}}</ref> [[Lieutenant commander|Lieutenant Commander]] John J. Ross of the U.S. Navy Medical Neuropsychiatric Research Unit later published an account of this event, which became well known among sleep-deprivation researchers.<ref name="Coren"/><ref name=Eleven>{{cite book |chapter=Eleven days awake |title=Elephants on Acid: And Other Bizarre Experiments | vauthors = Boese A |isbn=978-0-15-603135-6 |publisher=Harvest Books |pages=90–93 |chapter-url=https://books.google.com/books?id=Wc-UlRRWQ1EC&pg=PA90 |date=5 November 2007 |url-status=live |archive-url=https://web.archive.org/web/20140919124145/http://books.google.com/books?id=Wc-UlRRWQ1EC&lpg=PA90 |archive-date=19 September 2014 }}</ref><ref>{{cite journal | vauthors = Ross JJ | title = Neurological Findings After Prolonged Sleep Deprivation | journal = Archives of Neurology | volume = 12 | issue = 4 | pages = 399–403 | date = April 1965 | pmid = 14264871 | doi = 10.1001/archneur.1965.00460280069006 }}</ref>

The ''Guinness World Record'' stands at 449 hours (18 days, 17 hours), held by Maureen Weston of [[Peterborough]], [[Cambridgeshire]], in April 1977, in a rocking-chair marathon.<ref name=Eleven />

Claims of total sleep deprivation lasting years have been made several times,<ref name="thanh">{{cite news |url=http://www.thanhniennews.com/features/?catid=10&newsid=12673 |title=Vietnam man handles three decades without sleep | vauthors = Thao VP |work=Thanh Nien Daily |publisher=Vietnam National Youth Federation |access-date=26 May 2008 |archive-url = https://web.archive.org/web/20080513061843/http://www.thanhniennews.com/features/?catid=10&newsid=12673 |archive-date = 13 May 2008}}</ref><ref>{{Cite web|url=http://www.pravdareport.com/news/society/sex/15-01-2005/60995-0/|title=Ukrainian man has been lacking sleep for 20 years|access-date=5 October 2016|url-status=live|archive-url=https://web.archive.org/web/20161005214445/http://www.pravdareport.com/news/society/sex/15-01-2005/60995-0/|archive-date=5 October 2016|date=15 January 2005}}</ref><ref>{{cite news |url=https://abcnews.go.com/Health/story?id=7191766&page=4 | vauthors = Childs D |title=11 Baffling Medical Conditions |at=The Boy Who Couldn't Sleep |date=30 March 2009 |work=[[ABC News (United States)|ABC News]] }}</ref> but none are scientifically verified.<ref>{{cite news |title=Matters of dispute – Sleepless in Ukraine |newspaper=[[The Guardian]] |date=10 February 2005 |url=https://www.theguardian.com/theguardian/2005/feb/10/features11.g2 |access-date=11 May 2010 |url-status=live |archive-url=https://web.archive.org/web/20140304011755/http://www.theguardian.com/theguardian/2005/feb/10/features11.g2 |archive-date=4 March 2014 }}</ref> Claims of partial sleep deprivation are better documented. For example, Rhett Lamb of [[St. Petersburg, Florida]], was initially reported to not sleep at all but actually had a rare condition permitting him to sleep only one to two hours per day in the first three years of his life. He had a rare abnormality called an [[Arnold–Chiari malformation]], where [[brain tissue]] protrudes into the spinal canal and the skull puts pressure on the protruding part of the brain. The boy was operated on at [[All Children's Hospital]] in St. Petersburg in May 2008. Two days after surgery, he slept through the night.<ref>{{cite news|url=https://www.foxnews.com/story/boy-3-sleeps-for-first-time-after-experimental-surgery|title=Boy, 3, Sleeps for First Time After Experimental Surgery|date=16 May 2008|publisher=FoxNews.com|url-status=live|archive-url=https://web.archive.org/web/20161005204927/http://www.foxnews.com/story/2008/05/16/boy-3-sleeps-for-first-time-after-experimental-surgery.html|archive-date=5 October 2016}}</ref><ref>{{cite news |url=https://abcnews.go.com/GMA/OnCall/story?id=6711810&page=1 |title=Mystery of Sleepless Boy Solved: Boy Who Couldn't Sleep Undergoes Risky, Life-Changing Operation |work=[[ABC News (United States)|ABC News]]| vauthors = Canning A |date=23 January 2009}}</ref>

French sleep expert [[Michel Jouvet]] and his team reported the case of a patient who was quasi-sleep-deprived for four months, as confirmed by repeated [[polygraph]]ic recordings showing less than 30 minutes (of [[NREM sleep|stage-1 sleep]]) per night, a condition they named "agrypnia". The 27-year-old man had [[Morvan's syndrome|Morvan's fibrillary chorea]], a rare disease that leads to involuntary movements, and in this particular case, extreme [[insomnia]]. The researchers found that treatment with [[5-HTP]] restored almost normal sleep stages. However, some months after this recovery, the patient died during a relapse that was unresponsive to 5-HTP. The cause of death was pulmonary edema. Despite the extreme insomnia, psychological investigation showed no sign of cognitive deficits, except for some [[hallucination]]s.<ref>{{cite journal |last1=Fischer-Perroudon |first1=C. |last2=Mouret |first2=J. |last3=Jouvet |first3=M. |title=One case of agrypnia (4 months without sleep) in a morvan disease. Favourable action of 5-hydroxytryptophane |journal=Electroencephalography and Clinical Neurophysiology |date=January 1974 |volume=36 |issue=1 |pages=1–18 |doi=10.1016/0013-4694(74)90132-1 |pmid=4128428 }}</ref>

[[Fatal insomnia]] is a neurodegenerative disease that eventually results in a complete inability to go past [[Sleep#NREM 1|stage 1 of NREM sleep]]. In addition to insomnia, patients may experience panic attacks, paranoia, phobias, hallucinations, rapid weight loss, and [[dementia]]. Death usually occurs between 7 and 36 months from onset.{{fact|date=October 2024}}

== See also ==
{{col div|colwidth=36em}}
* [[Effects of sleep deprivation on cognitive performance]]
* [[Narcolepsy]]
* [[Polyphasic sleep]]
* [[Sleep medicine]]
* [[Sleep onset latency]]
* [[Wake therapy]]
* [[Tony Wright (sleep deprivation)|Tony Wright]], who claims to hold the world record for sleep deprivation
* ''[[Foreign Correspondent (film)|Foreign Correspondent]]'', a 1940 film depicting interrogation by sleep deprivation
{{colend}}

== References ==
{{Reflist|refs=
<ref name="performance">{{cite journal | vauthors = Thomas M, Sing H, Belenky G, Holcomb H, Mayberg H, Dannals R, Wagner H, Thorne D, Popp K, Rowland L, Welsh A, Balwinski S, Redmond D | title = Neural basis of alertness and cognitive performance impairments during sleepiness. I. Effects of 24 h of sleep deprivation on waking human regional brain activity | journal = Journal of Sleep Research | volume = 9 | issue = 4 | pages = 335–352 | date = December 2000 | pmid = 11123521 | doi = 10.1046/j.1365-2869.2000.00225.x }}</ref>
}}


{{SleepSeries2}}
{{SleepSeries2}}
{{Authority control}}


{{DEFAULTSORT:Sleep Deprivation}}
[[Category:Sleep]]
[[Category:Sleep medicine]]
[[Category:Sleeplessness and sleep deprivation| ]]
[[Category:Nursing diagnoses]]
[[Category:Psychological torture techniques]]
[[Category:Psychological torture techniques]]
[[Category:Physical torture techniques]]
[[Category:Physical torture techniques]]
[[Category:Disorders causing seizures]]

[[ar:إضطراب النوم]]
[[de:Schlafentzug]]
[[es:Privación de sueño]]
[[he:שינה זעירה]]
[[nl:Slaapdeprivatie]]
[[pt:Privação de sono]]
[[fi:Valvottaminen]]

Latest revision as of 12:19, 5 January 2025

The Centers for Disease Control and Prevention's (CDC) recommendations for the amount of sleep needed decrease with age.[1] While sleep quantity is important, good sleep quality is also essential to avoid sleeping disorders.[1]
Sleep deprivation
SpecialtySleep medicine
SymptomsFatigue, eye bags, poor memory, irritable mood, weight gain
ComplicationsCar and work accidents, weight gain, cardiovascular disease
CausesInsomnia, sleep apnea, stimulants (caffeine, amphetamine), voluntary imposition (school, work), mood disorders
TreatmentCognitive behavioral therapy, caffeine (to induce alertness), sleeping pills

Sleep deprivation, also known as sleep insufficiency[2] or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support decent alertness, performance, and health. It can be either chronic or acute and may vary widely in severity. All known animals sleep or exhibit some form of sleep behavior, and the importance of sleep is self-evident for humans, as nearly a third of a person's life is spent sleeping.[2] Sleep deprivation is common as it affects about one-third of the population.[3]

The National Sleep Foundation recommends that adults aim for 7–9 hours of sleep per night, while children and teenagers require even more. For healthy individuals with normal sleep, the appropriate sleep duration for school-aged children is between 9 and 11 hours.[4][5] Acute sleep deprivation occurs when a person sleeps less than usual or does not sleep at all for a short period, typically lasting one to two days. However, if the sleepless pattern persists without external factors, it may lead to chronic sleep issues. Chronic sleep deprivation occurs when a person routinely sleeps less than the amount required for proper functioning. The amount of sleep needed can depend on sleep quality, age, pregnancy, and level of sleep deprivation. Sleep deprivation is linked to various adverse health outcomes, including cognitive impairments, mood disturbances, and increased risk for chronic conditions. A meta-analysis published in Sleep Medicine Reviews indicates that individuals who experience chronic sleep deprivation are at a higher risk for developing conditions such as obesity, diabetes, and cardiovascular diseases.[citation needed]

Insufficient sleep has been linked to weight gain, high blood pressure, diabetes, depression, heart disease, and strokes.[6] Sleep deprivation can also lead to high anxiety, irritability, erratic behavior, poor cognitive functioning and performance, and psychotic episodes.[7] A chronic sleep-restricted state adversely affects the brain and cognitive function.[8] However, in a subset of cases, sleep deprivation can paradoxically lead to increased energy and alertness; although its long-term consequences have never been evaluated, sleep deprivation has even been used as a treatment for depression.[9][10]

To date, most sleep deprivation studies have focused on acute sleep deprivation, suggesting that acute sleep deprivation can cause significant damage to cognitive, emotional, and physical functions and brain mechanisms.[11] Few studies have compared the effects of acute total sleep deprivation and chronic partial sleep restriction.[8] A complete absence of sleep over a long period is not frequent in humans (unless they have fatal insomnia or specific issues caused by surgery); it appears that brief microsleeps cannot be avoided.[12] Long-term total sleep deprivation has caused death in lab animals.[13]

Terminology

[edit]

Sleep deprivation vs sleep restriction

[edit]

Reviews differentiate between having no sleep over a short-term period, such as one night ('sleep deprivation'), and having less than required sleep over a longer period ('sleep restriction'). Sleep deprivation was seen as more impactful in the short term, but sleep restriction had similar effects over a longer period.[14][15][16][17][18] A 2022 study found that in most cases the changes induced by chronic or acute sleep loss waxed or waned across the waking day.[19]

Sleep debt

[edit]

Sleep debt refers to a build up of lost optimum sleep. Sleep deprivation is known to be cumulative.[20] This means that the fatigue and sleep one lost as a result of, for example, staying awake all night, would be carried over to the following day.[21][22][23] Not getting enough sleep for a couple of days cumulatively builds up a deficiency and causes symptoms of sleep deprivation to appear. A well-rested and healthy individual will generally spend less time in the REM stage of sleep. Studies have shown an inverse relationship between time spent in the REM stage of sleep and subsequent wakefulness during waking hours.[24] Short-term insomnia can be induced by stress or when the body experiences changes in environment and regimen.[25]

Insomnia

[edit]

Insomnia is a sleep disorder where people have difficulty falling asleep, or staying asleep for as long as desired.[26][27][28][29] Insomnia may be a factor in causing sleep deprivation.

Effects and consequences

[edit]
Main health effects of sleep deprivation

Introduction and overview

[edit]

Effects of sleep deprivation can include

  • reduced ability to put an emotional event in perspective
  • inattentiveness (including reduced driving ability)
  • reduced working memory
  • mood effects
  • feeling older
  • microsleeps.[30]

Negative effects

[edit]

Brain

[edit]
Temporary
[edit]

One study suggested, based on neuroimaging, that 35 hours of total sleep deprivation in healthy controls negatively affected the brain's ability to put an emotional event into the proper perspective and make a controlled, suitable response to the event.[31]

According to the latest research, lack of sleep may cause more harm than previously thought and may lead to the permanent loss of brain cells.[32] The negative effects of sleep deprivation on alertness and cognitive performance suggest decreases in brain activity and function. These changes primarily occur in two regions: the thalamus, a structure involved in alertness and attention, and the prefrontal cortex, a region subserving alertness, attention, and higher-order cognitive processes.[33] Interestingly, the effects of sleep deprivation appear to be constant across "night owls" and "early birds", or different sleep chronotypes, as revealed by fMRI and graph theory.[34]

Lasting
[edit]
REM sleep deprivation causes swollen mitochondria in neurons (caused by cytochrome c); noradrenaline receptor blockers keep their inner cristae intact.

Studies on rodents show that the response to neuronal injury due to acute sleep deprivation is adaptative before three hours of sleep loss per night and becomes maladaptative, and apoptosis occurs after.[35] Studies in mice show neuronal death (in the hippocampus, locus coeruleus, and medial PFC) occurs after two days of REM sleep deprivation. However, mice do not model the effects in humans well since they sleep a third of the duration of REM sleep of humans and caspase-3, the main effector of apoptosis, kills three times the number of cells in humans than in mice.[36] Also not accounted for in nearly all of the studies is that acute REM sleep deprivation induces lasting (> 20 days) neuronal apoptosis in mice, and the apoptosis rate increases on the day following its end, so the amount of apoptosis is often undercounted in mice because experiments nearly always measure it the day the sleep deprivation ends.[37] For these reasons, both the time before cells degenerate and the extent of degeneration could be greatly underevaluated in humans.

Such histological studies cannot be performed on humans for ethical reasons, but long-term studies show that sleep quality is more associated with gray matter volume reduction[38] than age,[39] occurring in areas like the precuneus.[40]

Molecular pathway of REM sleep deprivation-induced apoptosis in neurons

Sleep is necessary to repair cellular damage caused by reactive oxygen species and DNA damage. During long-term sleep deprivation, cellular damage aggregates up to a tipping point that triggers cellular degeneration and apoptosis. REM sleep deprivation causes an increase in noradrenaline (which incidentally causes the person sleep deprived to be stressed) due to the neurons in the locus coeruleus producing it not ceasing to do so, which causes an increase in the activity of the Na⁺/K⁺-ATPase pump, which itself activates the intrinsic pathway of apoptosis[41] and prevents autophagy, which also induces the mitochondrial pathway of apoptosis.

Sleep outside of the REM phase may allow enzymes to repair brain cell damage caused by free radicals. High metabolic activity while awake damages the enzymes themselves, preventing efficient repair. This study observed the first evidence of brain damage in rats as a direct result of sleep deprivation.[42]

Cognitive and neurobehavioural effects

[edit]

A 2009 review found that sleep loss had a wide range of cognitive and neurobehavioral effects including unstable attention, slowing of response times, decline of memory performance, reduced learning of cognitive tasks, deterioration of performance in tasks requiring divergent thinking, perseveration with ineffective solutions, performance deterioration as task duration increases; and growing neglect of activities judged to be nonessential.[43]

Attention
[edit]

Attentional lapses also extend into more critical domains in which the consequences can be life or death; car crashes and industrial disasters can result from inattentiveness attributable to sleep deprivation. To empirically measure the magnitude of attention deficits, researchers typically employ the psychomotor vigilance task (PVT), which requires the subject to press a button in response to a light at random intervals. Failure to press the button in response to the stimulus (light) is recorded as an error, attributable to the microsleeps that occur as a product of sleep deprivation.[44]

Crucially, individuals' subjective evaluations of their fatigue often do not predict actual performance on the PVT. While totally sleep-deprived individuals are usually aware of the degree of their impairment, lapses from chronic (lesser) sleep deprivation can build up over time so that they are equal in number and severity to the lapses occurring from total (acute) sleep deprivation. Chronically sleep-deprived people, however, continue to rate themselves considerably less impaired than totally sleep-deprived participants.[45] Since people usually evaluate their capability on tasks like driving subjectively, their evaluations may lead them to the false conclusion that they can perform tasks that require constant attention when their abilities are in fact impaired.[citation needed]

Driving ability
[edit]

According to a 2000 study, sleep deprivation can have some of the same hazardous effects as being drunk.[46] People who drove after being awake for 17–19 hours performed worse than those with a blood alcohol level of 0.05 percent, which is the legal limit for drunk driving in most western European countries and Australia. Another study suggested that performance begins to degrade after 16 hours awake, and 21 hours awake was equivalent to a blood alcohol content of 0.08 percent, which is the blood alcohol limit for drunk driving in Canada, the U.S., and the U.K.[47]

The fatigue of drivers of goods trucks and passenger vehicles has come to the attention of authorities in many countries, where specific laws have been introduced with the aim of reducing the risk of traffic accidents due to driver fatigue. Rules concerning minimum break lengths, maximum shift lengths, and minimum time between shifts are common in the driving regulations used in different countries and regions, such as the drivers' working hours regulations in the European Union and hours of service regulations in the United States. The American Academy of Sleep Medicine (AASM) reports that one in every five serious motor vehicle injuries are related to driver fatigue. The National Sleep Foundation identifies several warning signs that a driver is dangerously fatigued. These include rolling down the window, turning up the radio, having trouble keeping eyes open, head-nodding, drifting out of their lane, and daydreaming. At particular risk are lone drivers between midnight and 6:00 a.m.[48]

Sleep deprivation can negatively impact overall performance and has led to major fatal accidents. Due largely to the February 2009 crash of Colgan Air Flight 3407, which killed 50 people and was partially attributed to pilot fatigue, the FAA reviewed its procedures to ensure that pilots are sufficiently rested. Air traffic controllers were under scrutiny when, in 2010, there were 10 incidents of controllers falling asleep while on shift. The common practice of turn-around shifts caused sleep deprivation and was a contributing factor to all air traffic control incidents. The FAA reviewed its practices for shift changes, and the findings showed that controllers were not well rested.[49] A 2004 study also found medical residents with less than four hours of sleep a night made more than twice as many errors as the 11% of surveyed residents who slept for more than seven hours a night.[50]

Impacts on reasoning and decision-making
[edit]

Twenty-four hours of continuous sleep deprivation results in the choice of less difficult math tasks without a decrease in subjective reports of effort applied to the task.[citation needed] Naturally occurring sleep loss affects the choice of everyday tasks, such that low-effort tasks are mostly commonly selected.[citation needed] Adolescents who experience less sleep show a decreased willingness to engage in sports activities that require effort through fine motor coordination and attention to detail.[51][52]

Astronauts have reported performance errors and decreased cognitive ability during periods of extended working hours and wakefulness, as well as sleep loss caused by circadian rhythm disruption and environmental factors.[53]

Working memory
[edit]

Deficits in attention and working memory are one of the most important;[8] such lapses in mundane routines can lead to unfortunate results, from forgetting ingredients while cooking to missing a sentence while taking notes. Performing tasks that require attention appears to be correlated with the number of hours of sleep received each night, declining as a function of hours of sleep deprivation.[54] Working memory is tested by methods such as choice-reaction time tasks.[8]

Mood

[edit]

Sleep deprivation can have a negative impact on mood.[55] Staying up all night or taking an unexpected night shift can make one feel irritable. Once one catches up on sleep, one's mood will often return to baseline or normal. Even partial sleep deprivation can have a significant impact on mood. In one study, subjects reported increased sleepiness, fatigue, confusion, tension, and total mood disturbance, which all recovered to their baseline after one to two full nights of sleep.[56][57]

Depression and sleep are in a bidirectional relationship. Poor sleep can lead to the development of depression, and depression can cause insomnia, hypersomnia, or obstructive sleep apnea.[58][59] About 75% of adult patients with depression can present with insomnia.[60] Sleep deprivation, whether total or not, can induce significant anxiety, and longer sleep deprivations tend to result in an increased level of anxiety.[61]

Sleep deprivation has also shown some positive effects on mood and can be used to treat depression.[10] Chronotype can affect how sleep deprivation influences mood. Those with morningness (advanced sleep period or "lark") preference become more depressed after sleep deprivation, while those with eveningness (delayed sleep period or "owl") preference show an improvement in mood.[62]

Mood and mental states can affect sleep as well. Increased agitation and arousal from anxiety or stress can keep one more aroused, awake, and alert.[56]

Subjective age

[edit]

One study found that sleepiness increases the subjective sense one is old, with extreme sleepiness leading people to feel 10 years older.[63] Other studies have also shown a correlation between relatively old subjective age and poor sleep quality.[64][65]

Fatigue

[edit]

Sleep deprivation and disruption is associated with subsequent fatigue.[66][67] Fatigue has different effects and characteristics from sleep deprivation.

Sleep

[edit]
Propensity
[edit]

Sleep propensity can be defined as the readiness to transition from wakefulness to sleep or the ability to stay asleep if already sleeping.[68] Sleep deprivation increases this propensity, which can be measured by polysomnography (PSG) as a reduction in sleep latency (the time needed to fall asleep).[69] An indicator of sleep propensity can also be seen in the shortening of the transition from light stages of non-REM sleep to deeper slow-wave oscillations.[69]

On average, the latency in healthy adults decreases by a few minutes after a night without sleep, and the latency from sleep onset to slow-wave sleep is halved.[69] Sleep latency is generally measured with the multiple sleep latency test (MSLT). In contrast, the maintenance of wakefulness test (MWT) also uses sleep latency, but this time as a measure of the capacity of the participants to stay awake (when asked to) instead of falling asleep.[69]

Impact on the sleep-wake cycle
[edit]

Some research shows that sleep deprivation dysregulates the sleep-wake cycle.[69] Multiple studies that identified the role of the hypothalamus and multiple neural systems controlling circadian rhythms and homeostasis have been helpful in understanding sleep deprivation better.[69][70]

To describe the temporal course of the sleep-wake cycle, a two-process model of sleep regulation can be mentioned.[69] This model proposes a homeostatic process (Process S) and a circadian process (Process C) that interact to define the time and intensity of sleep.[71] Process S represents the drive for sleep, increasing during wakefulness and decreasing during sleep until a defined threshold level, while Process C is the oscillator responsible for these levels. When being sleep deprived, homeostatic pressure accumulates to the point that waking functions will be degraded even at the highest circadian drive for wakefulness.[69][71]

Microsleeps
[edit]

Microsleeps are periods of brief sleep that most frequently occur when a person has a significant level of sleep deprivation.[72] Microsleeps usually last for a few seconds, usually no longer than 15 seconds,[73] and happen most frequently when a person is trying to stay awake when they are feeling sleepy.[74] The person usually falls into microsleep while doing a monotonous task like driving, reading a book, or staring at a computer.[75] Microsleeps are similar to blackouts, and a person experiencing them is not consciously aware that they are occurring.

An even lighter type of sleep has been seen in rats that have been kept awake for long periods of time. In a process known as local sleep, specific localized brain regions went into periods of short (~80 ms) but frequent (~40/min) NREM-like states. Despite the on-and-off periods where neurons shut off, the rats appeared to be awake, although they performed poorly at tests.[76]

Cardiovascular morbidity

[edit]

Decreased sleep duration is associated with many adverse cardiovascular consequences.[77][78][79][80] The American Heart Association has stated that sleep restriction is a risk factor for adverse cardiometabolic profiles and outcomes. The organization recommends healthy sleep habits for ideal cardiac health, along with other well-known factors like blood pressure, cholesterol, diet, glucose, weight, smoking, and physical activity.[81] The Centers for Disease Control and Prevention has noted that adults who sleep less than seven hours per day are more likely to have chronic health conditions, including heart attack, coronary heart disease, and stroke, compared to those with an adequate amount of sleep.[82]

In a study that followed over 160,000 healthy, non-obese adults, the subjects who self-reported sleep duration less than six hours a day were at increased risk for developing multiple cardiometabolic risk factors. They presented with increased central obesity, elevated fasting glucose, hypertension, low high-density lipoprotein, hypertriglyceridemia, and metabolic syndrome. The presence or lack of insomnia symptoms did not modify the effects of sleep duration in this study.[83]

The United Kingdom Biobank studied nearly 500,000 adults who had no cardiovascular disease, and the subjects who slept less than six hours a day were associated with a 20 percent increase in the risk of developing myocardial infarction (MI) over a seven-year follow-up period. Interestingly, a long sleep duration of more than nine hours a night was also a risk factor.[84]

Immunosuppression

[edit]

Among the myriad of health consequences that sleep deprivation can cause, disruption of the immune system is one of them. While it is not clearly understood, researchers believe that sleep is essential to providing sufficient energy for the immune system to work and allowing inflammation to take place during sleep. Also, just as sleep can reinforce memory in a person's brain, it can help consolidate the memory of the immune system, or adaptive immunity.[85][86]

Sleep quality is directly related to immunity levels. The team, led by Professor Cohen of Carnegie Mellon University in the United States, found that even a slight disturbance of sleep may affect the body's response to the cold virus. Those with better sleep quality had significantly higher blood T and B lymphocytes than those with poor sleep quality. These two lymphocytes are the main body of immune function in the human body.[87]

An adequate amount of sleep improves the effects of vaccines that utilize adaptive immunity. When vaccines expose the body to a weakened or deactivated antigen, the body initiates an immune response. The immune system learns to recognize that antigen and attacks it when exposed again in the future. Studies have found that people who don't sleep the night after getting a vaccine are less likely to develop a proper immune response to the vaccine and sometimes even require a second dose. [citation needed] People who are sleep deprived in general also do not provide their bodies with sufficient time for an adequate immunological memory to form and, thus, can fail to benefit from vaccination.[85]

People who sleep less than six hours a night are more susceptible to infection and are more likely to catch a cold or flu. A lack of sleep can also prolong the recovery time of patients in the intensive care unit (ICU).[85][88][89]

Weight gain

[edit]

A lack of sleep can cause an imbalance in several hormones that are critical for weight gain. Sleep deprivation increases the level of ghrelin (hunger hormone) and decreases the level of leptin (fullness hormone), resulting in an increased feeling of hunger and a desire for high-calorie foods.[90][91] Sleep loss is also associated with decreased growth hormone and elevated cortisol levels, which are connected to obesity. People who do not get sufficient sleep can also feel sleepy and fatigued during the day and get less exercise. Obesity can cause poor sleep quality as well. Individuals who are overweight or obese can experience obstructive sleep apnea, gastroesophageal reflux disease (GERD), depression, asthma, and osteoarthritis, all of which can disrupt a good night's sleep.[92]

In rats, prolonged, complete sleep deprivation increased both food intake and energy expenditure, with a net effect of weight loss and ultimately death.[93] This study hypothesizes that the moderate chronic sleep debt associated with habitual short sleep is associated with increased appetite and energy expenditure, with the equation tipped towards food intake rather than expenditure in societies where high-calorie food is freely available.[91]

Type 2 diabetes

[edit]

It has been suggested that people experiencing short-term sleep restrictions process glucose more slowly than individuals receiving a full 8 hours of sleep, increasing the likelihood of developing type 2 diabetes.[94] Poor sleep quality is linked to high blood sugar levels in diabetic and prediabetic patients, but the causal relationship is not clearly understood. Researchers suspect that sleep deprivation affects insulin, cortisol, and oxidative stress, which subsequently influence blood sugar levels. Sleep deprivation can increase the level of ghrelin and decrease the level of leptin. People who get insufficient amounts of sleep are more likely to crave food in order to compensate for the lack of energy. This habit can raise blood sugar and put them at risk of obesity and diabetes.[95]

In 2005, a study of over 1400 participants showed that participants who habitually slept fewer hours were more likely to have associations with type 2 diabetes.[96] However, because this study was merely correlational, the direction of cause and effect between little sleep and diabetes is uncertain. The authors point to an earlier study that showed that experimental rather than habitual restriction of sleep resulted in impaired glucose tolerance (IGT).[97]

Other effects

[edit]

Sleep deprivation may facilitate or intensify:[98]

Sleep deprivation may cause symptoms similar to:

Positive effects

[edit]

Increased energy and alertness in some cases

[edit]

In a subset of cases, sleep deprivation can paradoxically lead to increased energy and alertness.[9][10]

Other

[edit]

See the Uses section below for possible beneficial benefits of sleep deprivation on treating depression and insomnia.

Causes

[edit]

People aged 18 to 64 need seven to nine hours of sleep per night.[116] Sleep deprivation occurs when this is not achieved. Causes of this can be as follows:

Environmental Factors

[edit]

Environmental factors significantly influence sleep quality and can contribute to sleep deprivation in various ways. Noise pollution from traffic, construction, and loud neighbors can disrupt sleep by causing awakenings and preventing deeper sleep stages.[117] Similarly, light exposure, particularly from artificial sources like screens, interferes with the body’s natural circadian rhythms by suppressing melatonin production, making it challenging to fall asleep.[118] Air quality, odours and temperatures can all affect sleep quality and duration as well.[119]

To mitigate the effects of these environmental influences, individuals can consider strategies, such as using soundproofing measures, installing blackout curtains, adjusting room temperatures,[120] investing in comfortable bedding, and improving air quality with purifiers. By addressing these environmental factors, individuals can enhance their sleep hygiene and overall health.

Insomnia

[edit]

Insomnia, one of the six types of dyssomnia, affects 21–37% of the adult population.[121][122][123] Many of its symptoms are easily recognizable, including excessive daytime sleepiness; frustration or worry about sleep; problems with attention, concentration, or memory; extreme mood changes or irritability; lack of energy or motivation; poor performance at school or work; and tension headaches or stomach aches.

Insomnia can be grouped into primary and secondary, or comorbid, insomnia.[124][125][126]

Primary insomnia is a sleep disorder not attributable to a medical, psychiatric, or environmental cause.[127] There are three main types of primary insomnia. These include psychophysiological, idiopathic insomnia, and sleep state misperception (paradoxical insomnia).[124] Psychophysiological insomnia is anxiety-induced. Idiopathic insomnia generally begins in childhood and lasts for the rest of a person's life. It's suggested that idiopathic insomnia is a neurochemical problem in a part of the brain that controls the sleep-wake cycle, resulting in either under-active sleep signals or over-active wake signals. Sleep state misperception is diagnosed when people get enough sleep but inaccurately perceive that their sleep is insufficient.[128]

Secondary insomnia, or comorbid insomnia, occurs concurrently with other medical, neurological, psychological, and psychiatric conditions. Causation is not necessarily implied.[129] Causes can be from depression, anxiety, and personality disorders.[130]

Sleep apnea

[edit]

Sleep apnea is a serious disorder that has symptoms of both insomnia and sleep deprivation, among other symptoms like excessive daytime sleepiness, abrupt awakenings, and difficulty concentrating.[131] It is a sleep related breathing disorder that can cause partial or complete obstruction of the upper airways during sleep.[132] One billion people worldwide are affected by obstructive sleep apnea.[132] Those with sleep apnea may experience symptoms such as awakening gasping or choking, restless sleep, morning headaches, morning confusion or irritability, and restlessness. This disorder affects 1 to 10 percent of Americans.[133] It has many serious health outcomes if left untreated. Positive airway pressure therapy using CPAP (continuous positive airway pressure), APAP, or BPAP devices is considered the first-line treatment option for sleep apnea.[134]

Central sleep apnea is caused by a failure of the central nervous system to signal the body to breathe during sleep. Treatments similar to obstructive sleep apnea may be used, as well as other treatments such as adaptive servo ventilation and certain medications. Some medications, such as opioids, may contribute to or cause central sleep apnea.[135]

Self-imposed

[edit]

Sleep deprivation can sometimes be self-imposed due to a lack of desire to sleep or the habitual use of stimulant drugs. Revenge Bedtime Procrastination is a need to stay up late after a busy day to feel like the day is longer, leading to sleep deprivation from staying up and wanting to make the day "seem/feel" longer.[136]

Caffeine

[edit]
This diagram shows how caffeine affects the different areas of the body, both positively and negatively.

Consumption of caffeine in large quantities can have negative effects on one's sleep cycle.

Caffeine consumption, usually in the form of coffee, is one of the most widely used stimulants in the world.[137] While there are short-term performance benefits to caffeine consumption, overuse can lead to insomnia symptoms or worsen pre-existing insomnia.[138] Consuming caffeine to stay awake at night may lead to sleeplessness, anxiety, frequent nighttime awakenings, and overall poorer sleep quality.[139] The main metabolite of melatonin (6-sulfatoxymelatonin) gets reduced with consumption of caffeine in the day, which is one of the mechanisms by which sleep is interrupted.[137]

Studying

[edit]

The U.S. National Sleep Foundation cites a 1996 paper showing that college/university-aged students get an average of less than 6 hours of sleep each night.[140] A 2018 study highlights the need for a good night's sleep for students, finding that college students who averaged eight hours of sleep for the five nights of finals week scored higher on their final exams than those who did not.[141]

In the study, 70.6% of students reported obtaining less than 8 hours of sleep, and up to 27% of students may be at risk for at least one sleep disorder.[142] Sleep deprivation is common in first-year college students as they adjust to the stress and social activities of college life.

Estevan et al. studied the relationships between sleep and test performance. They found that students tend to sleep less than usual the night before an exam and that exam performance was positively correlated with sleep duration.[143]

A study performed by the Department of Psychology at the National Chung Cheng University in Taiwan concluded that freshmen received the least amount of sleep during the week.[144]

Studies of later start times in schools have consistently reported benefits to adolescent sleep, health, and learning using a wide variety of methodological approaches. In contrast, there are no studies showing that early start times have any positive impact on sleep, health, or learning.[145] Data from international studies demonstrate that "synchronized" start times for adolescents are far later than the start times in the overwhelming majority of educational institutions.[145] In 1997, University of Minnesota researchers compared students who started school at 7:15 a.m. with those who started at 8:40 a.m. They found that students who started at 8:40 got higher grades and more sleep on weekday nights than those who started earlier.[146] One in four U.S. high school students admits to falling asleep in class at least once a week.[147]

It is known that during human adolescence, circadian rhythms and, therefore, sleep patterns typically undergo marked changes. Electroencephalogram (EEG) studies indicate a 50% reduction in deep (stage 4) sleep and a 75% reduction in the peak amplitude of delta waves during NREM sleep in adolescence. School schedules are often incompatible with a corresponding delay in sleep offset, leading to a less than optimal amount of sleep for the majority of adolescents.[148]

Mental illness

[edit]

Chronic sleep problems affect 50% to 80% of patients in a typical psychiatric practice, compared with 10% to 18% of adults in the general U.S. population. Sleep problems are particularly common in patients with anxiety, depression, bipolar disorder, and attention deficit hyperactivity disorder (ADHD).[131]

The specific causal relationships between sleep loss and effects on psychiatric disorders have been most extensively studied in patients with mood disorders.[149][medical citation needed] Shifts into mania in bipolar patients are often preceded by periods of insomnia,[150] and sleep deprivation has been shown to induce a manic state in about 30% of patients.[151] Sleep deprivation may represent a final common pathway in the genesis of mania,[152] and manic patients usually have a continuous reduced need for sleep.[153]

The symptoms of sleep deprivation and those of schizophrenia are parallel, including those of positive and cognitive symptoms.[154]

Hospital stay

[edit]

A study performed nationwide in the Netherlands found that general ward patients staying at the hospital experienced shorter total sleep (83 min. less), more night-time awakenings, and earlier awakenings compared to sleeping at home. Over 70% experienced being woken up by external causes, such as hospital staff (35.8%). Sleep-disturbing factors included the noise of other patients, medical devices, pain, and toilet visits.[155] Sleep deprivation is even more severe in ICU patients, where the naturally occurring nocturnal peak of melatonin secretion was found to be absent, possibly causing the disruption in the normal sleep-wake cycle.[156] However, as the personal characteristics and the clinical picture of hospital patients are so diverse, the possible solutions to improve sleep and circadian rhythmicity should be tailored to the individual and within the possibilities of the hospital ward. Multiple interventions could be considered to aid patient characteristics, improve hospital routines, or improve the hospital environment.[157]

Time online

[edit]

A 2018 study published in the Journal of Economic Behavior and Organization found that broadband internet connection was associated with sleep deprivation. The study concluded that people with a broadband connection tend to sleep 25 minutes less than those without a broadband connection; hence, they are less likely to get the scientifically recommended 7–9 hours of sleep.[158] Another study conducted on 435 non-medical staff at King Saud University Medical City reported that 9 out of 10 of the respondents used their smartphones at bedtime, with social media being the most used service (80.5%). The study found participants who spent more than 60 minutes using their smartphones at bedtime were 7.4 times more likely to have poor sleep quality than participants who spent less than 15 minutes.[159] Overall, internet usage an hour before bedtime has been found to disrupt sleeping patterns.

Shift work

[edit]

Many businesses are operational 24/7, such as airlines, hospitals, etc., where workers perform their duties in different shifts. Shift work patterns cause sleep deprivation and lead to poor concentration, detrimental health effects, and fatigue. Shift work can disrupt the normal circadian rhythms of biologic functions, which is associated with the sleep/wake cycle. Both the sleep length and quality can be affected. A “shift-work sleep disorder” has been diagnosed in approximately 10% of shift workers aged between 18-65 years old according to the International Classification of Sleep Disorders, version 2 (ICSD-2).[160] Shift work remains an unspoken challenge within industries, often disregarded by both employers and employees alike, leading to an increase in occupational injuries. A worker experiencing fatigue poses a potential danger, not only to themselves, but also to others around them. Both employers and employees must acknowledge the risks associated with sleep deprivation and on-the-job fatigue to effectively mitigate the chances of occupational injuries.[161]

Assessment

[edit]

Patients with sleep deprivation may present with complaints of symptoms and signs of insufficient sleep, such as fatigue, sleepiness, drowsy driving, and cognitive difficulties. Sleep insufficiency can easily go unrecognized and undiagnosed unless patients are specifically asked about it by their clinicians.[162]

Several questions are critical in evaluating sleep duration and quality, as well as the cause of sleep deprivation. Sleep patterns (typical bed time or rise time on weekdays and weekends), shift work, and frequency of naps can reveal the direct cause of poor sleep, and quality of sleep should be discussed to rule out any diseases such as obstructive sleep apnea and restless leg syndrome.[162]

Sleep diaries

[edit]

Sleep diaries are useful in providing detailed information about sleep patterns. They are inexpensive, readily available, and easy to use. The diaries can be as simple as a 24-hour log to note the time of being asleep or can be detailed to include other relevant information.[163][164]

Sleep questionnaires

[edit]

Sleep questionnaires such as the Sleep Timing Questionnaire (STQ) and Tayside children’s sleep questionnaire can be used instead of sleep diaries if there is any concern for patient adherence.[165][166]

Sleep quality can be assessed using the Pittsburgh Sleep Quality Index (PSQI), a self-report questionnaire designed to measure sleep quality and disturbances over a one-month period.

Actigraphy

[edit]

Actigraphy is a useful, objective wrist-worn tool if the validity of self-reported sleep diaries or questionnaires is questionable. Actigraphy works by recording movements and using computerized algorithms to estimate total sleep time, sleep onset latency, the amount of wake after sleep onset, and sleep efficiency. Some devices have light sensors to detect light exposure.[167][168][169][170]

Wearable devices

[edit]

Wearable devices such as Fitbits and Apple Watches monitor various body signals, including heart rate, skin temperature, and movement, to provide information about sleep patterns. They operate continuously, collecting extensive data which can be used to offer insights on sleep improvement. These devices are user-friendly and have increased awareness about the significance of quality sleep for health.[171]

Prevention

[edit]

Although there are numerous causes of sleep deprivation, there are some fundamental measures that promote quality sleep, as suggested by organizations such as the Centers for Disease Control and Prevention, the National Institute of Health, the National Institute of Aging, and the American Academy of Family Physicians.

Sleep hygiene

[edit]

Historically, sleep hygiene, as first medically defined by Hauri in 1977,[172] was the standard for promoting healthy sleep habits, but evidence that has emerged since the 2010s suggests they are ineffective, both for people with insomnia[173] and for people without.[172] The key is to implement healthier sleep habits, also known as sleep hygiene.[174]

Sleep hygiene recommendations include

  • setting a fixed sleep schedule
  • taking naps with caution
  • maintaining a sleep environment that promotes sleep (cool temperature, limited exposure to light and noise)
  • comfortable mattresses and pillows
  • exercising daily
  • avoiding alcohol, cigarettes and caffeine
  • avoiding heavy meals in the evening
  • winding down and avoiding electronic use or physical activities close to bedtime
  • getting out of bed if unable to fall asleep.[175]

CBT

[edit]

For long-term involuntary sleep deprivation, cognitive behavioral therapy for insomnia (CBT-i) is recommended as a first-line treatment after the exclusion of a physical diagnosis (e.g., sleep apnea).[173]

CBT-i contains five different components:

  • cognitive therapy
  • stimulus control
  • sleep restriction
  • sleep hygiene
  • relaxation.

As this approach has minimal adverse effects and long-term benefits, it is often preferred to (chronic) drug therapy.[176]

Management

[edit]

Measures to increase alertness

[edit]

There are several strategies that help increase alertness and counteract the effects of sleep deprivation.

  • Caffeine is often used over short periods to boost wakefulness when acute sleep deprivation is experienced; however, caffeine is less effective if taken routinely.[177]

Other strategies recommended by the American Academy of Sleep Medicine include

  • prophylactic sleep before deprivation,
  • naps,
  • other stimulants,

and combinations thereof.

However, the American Academy of Sleep Medicine has said that the only sure and safe way to combat sleep deprivation is to increase nightly sleep time.[178]

Uses

[edit]

Treating depression

[edit]

Studies show that sleep restriction has some potential for treating depression.[10] Those with depression tend to have earlier occurrences of REM sleep with an increased number of rapid eye movements; therefore, monitoring patients' EEG and awakening them during occurrences of REM sleep appear to have a therapeutic effect, alleviating depressive symptoms.[179] This kind of treatment is known as wake therapy. Although as many as 60% of patients show an immediate recovery when sleep-deprived, most patients relapse the following night. The effect has been shown to be linked to an increase in brain-derived neurotrophic factor (BDNF).[180] A comprehensive evaluation of the human metabolome in sleep deprivation in 2014 found that 27 metabolites are increased after 24 waking hours and suggested serotonin, tryptophan, and taurine may contribute to the antidepressive effect.[181]

The incidence of relapse can be decreased by combining sleep deprivation with medication or a combination of light therapy and phase advance (going to bed substantially earlier than one's normal time).[182][183] Many tricyclic antidepressants suppress REM sleep, providing additional evidence for a link between mood and sleep.[184] Similarly, tranylcypromine has been shown to completely suppress REM sleep at adequate doses.

Sleep deprivation has been used as a treatment for depression.[9][10]

Treating insomnia

[edit]

Sleep deprivation can be implemented for a short period of time in the treatment of insomnia. Some common sleep disorders have been shown to respond to cognitive behavioral therapy for insomnia. Cognitive behavioral therapy for insomnia is a multicomponent process that is composed of stimulus control therapy, sleep restriction therapy (SRT), and sleep hygiene therapy.[185] One of the components is a controlled regime of "sleep restriction" in order to restore the homeostatic drive to sleep and encourage normal "sleep efficiency".[186] Stimulus control therapy is intended to limit behaviors intended to condition the body to sleep while in bed.[185] The main goal of stimulus control and sleep restriction therapy is to create an association between bed and sleep. Although sleep restriction therapy shows efficacy when applied as an element of cognitive-behavioral therapy, its efficacy is yet to be proven when used alone.[186][176] Sleep hygiene therapy is intended to help patients develop and maintain good sleeping habits. Sleep hygiene therapy is not helpful, however, when used as a monotherapy without the pairing of stimulus control therapy and sleep restriction therapy.[185][173] Light stimulation affects the supraoptic nucleus of the hypothalamus, controlling circadian rhythm and inhibiting the secretion of melatonin from the pineal gland. Light therapy can improve sleep quality, improve sleep efficiency, and extend sleep duration by helping to establish and consolidate regular sleep-wake cycles. Light therapy is a natural, simple, low-cost treatment that does not lead to residual effects or tolerance. Adverse reactions include headaches, eye fatigue, and even mania.[187]

In addition to the cognitive behavioral treatment of insomnia, there are also generally four approaches to treating insomnia medically. These are through the use of barbiturates, benzodiazepines, and benzodiazepine receptor agonists. Barbiturates are not considered to be a primary source of treatment due to the fact that they have a low therapeutic index, while melatonin agonists are shown to have a higher therapeutic index.[185]

Military uses

[edit]

Military training

[edit]

Sleep deprivation has become hardwired into the military culture. It is prevalent in the entire force and especially severe for servicemembers deployed in high-conflict environments.[188][189]

Sleep deprivation has been used by the military in training programs to prepare personnel for combat experiences when proper sleep schedules are not realistic. Sleep deprivation is used to create a different schedule pattern that is beyond a typical 24-hour day. Sleep deprivation is pivotal in training games such as "Keep in Memory" exercises, where personnel practice memorizing everything they can while under intense stress physically and mentally and being able to describe in as much detail as they can remember of what they remember seeing days later. Sleep deprivation is used in training to create soldiers who are used to only going off of a few hours or minutes of sleep randomly when available.[citation needed]

DARPA initiated sleep research to create a highly resilient soldier capable of sustaining extremely prolonged wakefulness, inspired by the white-crowned sparrow's week-long sleeplessness during migration, at a time when it was not understood that migration birds actually slept with half of their brain. This pursuit aimed both to produce a "super soldier" able "to go for a minimum of seven days without sleep, and in the longer term perhaps at least double that time frame, while preserving high levels of mental and physical performance", and to enhance productivity in sleep-deprived personnel. Military experiments on sleep have been conducted on combatants and prisoners, such as those in Guantánamo, where controlled lighting is combined with torture techniques to manipulate sensory experiences. Crary highlights how constant illumination and the removal of day-night distinctions create what he defines as a "time of indifference," utilizing light management as a form of psychological control.[190][191]

However, studies have since evaluated the impact of the sleep deprivation imprint on the military culture. Personnel surveys reveal common challenges such as inadequate sleep, fatigue, and impaired daytime functioning, impacting operational effectiveness and post-deployment reintegration. These sleep issues elevate the risk of severe mental health disorders, including PTSD and depression. Early intervention is crucial. Though promising, implementing cognitive-behavioral and imagery-rehearsal therapies for insomnia remains a challenge. Several high-profile military accidents caused in part or fully by sleep deprivation of personnel have been documented. The military has prioritized sleep education, with recent Army guidelines equating sleep importance to nutrition and exercise. The Navy, particularly influenced by retired Captain John Cordle, has actively experimented with watch schedules to align shipboard life with sailors' circadian needs, leading to improved sleep patterns, especially in submarines, supported by ongoing research efforts at the Naval Postgraduate School. Watch schedules with longer and more reliable resting intervals are nowadays the norm on U.S. submarines and a recommended option for surface ships.[188][189]

In addition to sleep deprivation, circadian misalignment, as commonly experienced by submarine crews, causes several long-term health issues and a decrease in cognitive performance.[192]

To facilitate abusive control

[edit]

Sleep deprivation can be used to disorient abuse victims to help set them up for abusive control.[193][194]

Interrogation

[edit]

Sleep deprivation can be used as a means of interrogation, which has resulted in court trials over whether or not the technique is a form of torture.[195]

Under one interrogation technique, a subject might be kept awake for several days and, when finally allowed to fall asleep, suddenly awakened and questioned. Menachem Begin, the Prime Minister of Israel from 1977 to 1983, described his experience of sleep deprivation as a prisoner of the NKVD in the Soviet Union as follows:

In the head of the interrogated prisoner, a haze begins to form. His spirit is wearied to death, his legs are unsteady, and he has one sole desire: to sleep... Anyone who has experienced this desire knows that not even hunger and thirst are comparable with it.[196]

Sleep deprivation was one of the five techniques used by the British government in the 1970s. The European Court of Human Rights ruled that the five techniques "did not occasion suffering of the particular intensity and cruelty implied by the word torture ... [but] amounted to a practice of inhuman and degrading treatment", in breach of the European Convention on Human Rights.[197]

The United States Justice Department released four memos in August 2002 describing interrogation techniques used by the Central Intelligence Agency. They first described 10 techniques used in the interrogation of Abu Zubaydah, described as a terrorist logistics specialist, including sleep deprivation. Memos signed by Steven G. Bradbury in May 2005 claimed that forced sleep deprivation for up to 180 hours (7+12 days)[198][199] by shackling a diapered prisoner to the ceiling did not constitute torture,[200] nor did the combination of multiple interrogation methods (including sleep deprivation) constitute torture under United States law.[201][202] These memoranda were repudiated and withdrawn during the first months of the Obama administration.[198]

The question of the extreme use of sleep deprivation as torture has advocates on both sides of the issue. In 2006, Australian Federal Attorney-General Philip Ruddock argued that sleep deprivation does not constitute torture.[203] Nicole Bieske, a spokeswoman for Amnesty International Australia, has stated the opinion of her organization as follows: "At the very least, sleep deprivation is cruel, inhumane and degrading. If used for prolonged periods of time it is torture."[204]

Changes in American sleep habits

[edit]

National Geographic Magazine has reported that the demands of work, social activities, and the availability of 24-hour home entertainment and Internet access have caused people to sleep less now than in premodern times.[205] USA Today reported in 2007 that most adults in the USA get about an hour less than the average sleep time 40 years ago.[206]

Other researchers have questioned these claims. A 2004 editorial in the journal Sleep stated that, according to the available data, the average number of hours of sleep in a 24-hour period has not changed significantly in recent decades among adults. Furthermore, the editorial suggests that there is a range of normal sleep time required by healthy adults, and many indicators used to suggest chronic sleepiness among the population as a whole do not stand up to scientific scrutiny.[207]

A comparison of data collected from the Bureau of Labor Statistics' American Time Use Survey from 1965 to 1985 and 1998–2001 has been used to show that the median amount of sleep, napping, and resting done by the average adult American has changed by less than 0.7%, from a median of 482 minutes per day from 1965 through 1985 to 479 minutes per day from 1998 through 2001.[208][209]

Longest periods without sleep

[edit]

Randy Gardner holds the scientifically documented record for the longest period of time a human being has intentionally gone without sleep not using stimulants of any kind. Gardner stayed awake for 264 hours (11 days), breaking the previous record of 260 hours held by Tom Rounds of Honolulu.[210] Lieutenant Commander John J. Ross of the U.S. Navy Medical Neuropsychiatric Research Unit later published an account of this event, which became well known among sleep-deprivation researchers.[210][211][212]

The Guinness World Record stands at 449 hours (18 days, 17 hours), held by Maureen Weston of Peterborough, Cambridgeshire, in April 1977, in a rocking-chair marathon.[211]

Claims of total sleep deprivation lasting years have been made several times,[213][214][215] but none are scientifically verified.[216] Claims of partial sleep deprivation are better documented. For example, Rhett Lamb of St. Petersburg, Florida, was initially reported to not sleep at all but actually had a rare condition permitting him to sleep only one to two hours per day in the first three years of his life. He had a rare abnormality called an Arnold–Chiari malformation, where brain tissue protrudes into the spinal canal and the skull puts pressure on the protruding part of the brain. The boy was operated on at All Children's Hospital in St. Petersburg in May 2008. Two days after surgery, he slept through the night.[217][218]

French sleep expert Michel Jouvet and his team reported the case of a patient who was quasi-sleep-deprived for four months, as confirmed by repeated polygraphic recordings showing less than 30 minutes (of stage-1 sleep) per night, a condition they named "agrypnia". The 27-year-old man had Morvan's fibrillary chorea, a rare disease that leads to involuntary movements, and in this particular case, extreme insomnia. The researchers found that treatment with 5-HTP restored almost normal sleep stages. However, some months after this recovery, the patient died during a relapse that was unresponsive to 5-HTP. The cause of death was pulmonary edema. Despite the extreme insomnia, psychological investigation showed no sign of cognitive deficits, except for some hallucinations.[219]

Fatal insomnia is a neurodegenerative disease that eventually results in a complete inability to go past stage 1 of NREM sleep. In addition to insomnia, patients may experience panic attacks, paranoia, phobias, hallucinations, rapid weight loss, and dementia. Death usually occurs between 7 and 36 months from onset.[citation needed]

See also

[edit]

References

[edit]
  1. ^ a b "How Much Sleep Do I Need?". CDC.gov. Centers for Disease Control and Prevention (CDC). 14 September 2022. Archived from the original on 2 November 2023. Last Reviewed: September 14, 2022. Source: National Center for Chronic Disease Prevention and Health Promotion, Division of Population Health.
  2. ^ a b Amin F, Sankari A (2022). "Sleep Insufficiency". StatPearls. Treasure Island (FL): StatPearls Publishing. PMID 36256756. Retrieved 18 May 2023.
  3. ^ Grandner MA (2019). "Epidemiology of insufficient sleep and poor sleep quality". Sleep and Health. pp. 11–20. doi:10.1016/B978-0-12-815373-4.00002-2. ISBN 978-0-12-815373-4.
  4. ^ Hirshkowitz M, Whiton K, Albert SM, Alessi C, Bruni O, DonCarlos L, et al. (March 2015). "National Sleep Foundation's sleep time duration recommendations: methodology and results summary". Sleep Health. 1 (1): 40–43. doi:10.1016/j.sleh.2014.12.010.
  5. ^ Suni E, Dimitriu A (25 July 2023). "Sleep Deprivation: Understanding the Hidden Consequences". SleepFoundation.org.
  6. ^ Olson E. "How many hours of sleep are enough for good health?". Mayo Clinic. Simon & Schuster. Retrieved 7 March 2022.
  7. ^ "How poor sleep affects your mental health". Priory. 3 July 2018. Retrieved 17 April 2022.
  8. ^ a b c d Alhola P, Polo-Kantola P (October 2007). "Sleep deprivation: Impact on cognitive performance". Neuropsychiatric Disease and Treatment. 3 (5): 553–567. PMC 2656292. PMID 19300585. Although both conditions [total and partial SD] induce several negative effects including impairments in cognitive performance, the underlying mechanisms seem to be somewhat different.
  9. ^ a b c Nykamp K, Rosenthal L, Folkerts M, Roehrs T, Guido P, Roth T (September 1998). "The effects of REM sleep deprivation on the level of sleepiness/alertness". Sleep. 21 (6): 609–614. doi:10.1093/sleep/21.6.609. PMID 9779520.
  10. ^ a b c d e Riemann D, Berger M, Voderholzer U (July–August 2001). "Sleep and depression--results from psychobiological studies: an overview". Biological Psychology. 57 (1–3): 67–103. doi:10.1016/s0301-0511(01)00090-4. PMID 11454435.
  11. ^ Mai Z, Xu H, Ma N (October 2021). "Research progress on the impact of acute sleep deprivation on cognitive and emotional functions and its neural mechanisms". Chinese General Medicine (in Chinese). 24 (29): 3653–3659. doi:10.12114/j.issn.1007-9572.2021.01.016.
  12. ^ Kushida CA (2005). Sleep deprivation. Informa Health Care. pp. 1–2. ISBN 978-0-8247-5949-0.
  13. ^ Rechtschaffen A, Bergmann BM (1995). "Sleep deprivation in the rat by the disk-over-water method". Behavioural Brain Research. 69 (1–2): 55–63. doi:10.1016/0166-4328(95)00020-T. PMID 7546318.
  14. ^ Kayser KC, Puig VA, Estepp JR (2022). "Predicting and mitigating fatigue effects due to sleep deprivation: A review - PMC". Frontiers in Neuroscience. 16. doi:10.3389/fnins.2022.930280. PMC 9389006. PMID 35992930.
  15. ^ Paprocki J (17 July 2012). "The effects of sleep deprivation vs. sleep restriction". Sleep Education.
  16. ^ Reynolds AC, Banks S (2010). Total sleep deprivation, chronic sleep restriction and sleep disruption. Progress in Brain Research. Vol. 185. pp. 91–103. doi:10.1016/B978-0-444-53702-7.00006-3. ISBN 978-0-444-53702-7. PMID 21075235.
  17. ^ Mao T, Dinges D, Deng Y, Zhao K, Yang Z, Lei H, et al. (16 September 2021). "Impaired Vigilant Attention Partly Accounts for Inhibition Control Deficits After Total Sleep Deprivation and Partial Sleep Restriction". Nature and Science of Sleep. 13: 1545–1560. doi:10.2147/NSS.S314769. PMC 8455079. PMID 34557048.
  18. ^ Banks S, Dinges DF (15 August 2007). "Behavioral and Physiological Consequences of Sleep Restriction". Journal of Clinical Sleep Medicine. 03 (5): 519–528. doi:10.5664/jcsm.26918.
  19. ^ Groeger JA, Lo JC, Santhi N, Lazar AS, Dijk DJ (2022). "Contrasting Effects of Sleep Restriction, Total Sleep Deprivation, and Sleep Timing on Positive and Negative Affect - PMC". Frontiers in Behavioral Neuroscience. 16. doi:10.3389/fnbeh.2022.911994. PMC 9433122. PMID 36062257.
  20. ^ "Sleep Deprivation and Deficiency - How Much Sleep Is Enough". National Heart, Lung, and Blood Institute. 24 March 2022.
  21. ^ "Sleep Debt: Can You Catch up on Sleep?". Sleep Foundation. 20 January 2010. Retrieved 27 June 2022.
  22. ^ Colten HR, Altevogt BM, Research Io (2006). "Extent and Health Consequences of Chronic Sleep Loss and Sleep Disorders". Sleep Disorders and Sleep Deprivation: An Unmet Public Health Problem. National Academies Press (US).
  23. ^ "Sleep Debt: The Hidden Cost of Insufficient Rest". Sleep Foundation. 20 January 2010.
  24. ^ Plaford GR (2009). Sleep and learning : the magic that makes us healthy and smart. Lanham: Rowman & Littlefield Education. ISBN 978-1-60709-091-5. OCLC 310224798.
  25. ^ "Insomnia - What Is Insomnia?". National Heart, Lung, and Blood Institute. 24 March 2022.
  26. ^ "What Is Insomnia?". Health Topics. NHLBI. 24 March 2022. Archived from the original on 28 July 2016. Retrieved 26 November 2023.
  27. ^ "Insomnia: Causes, symptoms, and treatments". www.medicalnewstoday.com. 16 July 2020. Retrieved 25 July 2024.
  28. ^ Roth T (August 2007). "Insomnia: definition, prevalence, etiology, and consequences". Journal of Clinical Sleep Medicine (Supplement). 3 (5 Suppl): S7–10. doi:10.5664/jcsm.26929. PMC 1978319. PMID 17824495.
  29. ^ Punnoose AR, Golub RM, Burke AE (June 2012). "Insomnia". JAMA (JAMA patient page). 307 (24): 2653. doi:10.1001/jama.2012.6219. PMID 22735439.
  30. ^ See sections below for refs
  31. ^ Yoo SS, Gujar N, Hu P, Jolesz FA, Walker MP (October 2007). "The human emotional brain without sleep--a prefrontal amygdala disconnect". Current Biology. 17 (20): R877 – R878. Bibcode:2007CBio...17.R877Y. doi:10.1016/j.cub.2007.08.007. PMID 17956744.
  32. ^ "最新研究:睡眠不足会永久损伤脑细胞" [Latest research: Lack of sleep can permanently damage brain cells]. BBC News 中文 (Chinese) (in Simplified Chinese). 21 March 2014. Retrieved 5 December 2023.
  33. ^ Thomas M, Sing H, Belenky G, Holcomb H, Mayberg H, Dannals R, et al. (December 2000). "Neural basis of alertness and cognitive performance impairments during sleepiness. I. Effects of 24 h of sleep deprivation on waking human regional brain activity". Journal of Sleep Research. 9 (4): 335–352. doi:10.1046/j.1365-2869.2000.00225.x. PMID 11123521.
  34. ^ Farahani FV, Fafrowicz M, Karwowski W, Douglas PK, Domagalik A, Beldzik E, et al. (11 October 2019). "Effects of Chronic Sleep Restriction on the Brain Functional Network, as Revealed by Graph Theory". Frontiers in Neuroscience. 13. Frontiers Media SA: 1087. doi:10.3389/fnins.2019.01087. PMC 6807652. PMID 31680823.
  35. ^ Wu J, Dou Y, Ladiges WC (September 2020). "Adverse Neurological Effects of Short-Term Sleep Deprivation in Aging Mice Are Prevented by SS31 Peptide". Clocks & Sleep. 2 (3): 325–333. doi:10.3390/clockssleep2030024. PMC 7573804. PMID 33089207.
  36. ^ Kerr LE, McGregor AL, Amet LE, Asada T, Spratt C, Allsopp TE, et al. (October 2004). "Mice overexpressing human caspase 3 appear phenotypically normal but exhibit increased apoptosis and larger lesion volumes in response to transient focal cerebral ischaemia". Cell Death and Differentiation. 11 (10): 1102–1111. doi:10.1038/sj.cdd.4401449. PMID 15153940.
  37. ^ Soto-Rodriguez S, Lopez-Armas G, Luquin S, Ramos-Zuñiga R, Jauregui-Huerta F, Gonzalez-Perez O, et al. (2016). "Rapid Eye Movement Sleep Deprivation Produces Long-Term Detrimental Effects in Spatial Memory and Modifies the Cellular Composition of the Subgranular Zone". Frontiers in Cellular Neuroscience. 10: 132. doi:10.3389/fncel.2016.00132. PMC 4884737. PMID 27303266.
  38. ^ Haelle T (3 September 2014). "Poor Quality Sleep May Be Linked to Shrinking Brain". WebMD. Archived from the original on 9 March 2023. Retrieved 9 March 2023.
  39. ^ Van Someren EJ, Oosterman JM, Van Harten B, Vogels RL, Gouw AA, Weinstein HC, et al. (April 2019). "Medial temporal lobe atrophy relates more strongly to sleep-wake rhythm fragmentation than to age or any other known risk". Neurobiology of Learning and Memory. Sleep and Hippocampal Function. 160: 132–138. doi:10.1016/j.nlm.2018.05.017. hdl:2066/202856. PMID 29864525.
  40. ^ Grau-Rivera O, Operto G, Falcón C, Sánchez-Benavides G, Cacciaglia R, Brugulat-Serrat A, et al. (ALFA Study) (January 2020). "Association between insomnia and cognitive performance, gray matter volume, and white matter microstructure in cognitively unimpaired adults". Alzheimer's Research & Therapy. 12 (1): 4. doi:10.1186/s13195-019-0547-3. PMC 6945611. PMID 31907066.
  41. ^ Somarajan BI, Khanday MA, Mallick BN (2016). "Rapid Eye Movement Sleep Deprivation Induces Neuronal Apoptosis by Noradrenaline Acting on Alpha1 Adrenoceptor and by Triggering Mitochondrial Intrinsic Pathway". Frontiers in Neurology. 7: 25. doi:10.3389/fneur.2016.00025. PMC 4779900. PMID 27014180.
  42. ^ Siegel JM (November 2003). "Why We Sleep" (PDF). Scientific American. Archived (PDF) from the original on 3 December 2008. Retrieved 3 April 2008.
  43. ^ Goel N, Rao H, Durmer JS, Dinges DF (2009). "Neurocognitive Consequences of Sleep Deprivation - PMC". Seminars in Neurology. 29 (4): 320–339. doi:10.1055/s-0029-1237117. PMC 3564638. PMID 19742409.
  44. ^ Innes CR, Poudel GR, Jones RD (November 2013). "Efficient and regular patterns of nighttime sleep are related to increased vulnerability to microsleeps following a single night of sleep restriction". Chronobiology International. 30 (9): 1187–1196. doi:10.3109/07420528.2013.810222. PMID 23998288.
  45. ^ Van Dongen HP, Maislin G, Mullington JM, Dinges DF (March 2003). "The Cumulative Cost of Additional Wakefulness: Dose-Response Effects on Neurobehavioral Functions and Sleep Physiology From Chronic Sleep Restriction and Total Sleep Deprivation". Sleep. 26 (2): 117–126. doi:10.1093/sleep/26.2.117. PMID 12683469.
  46. ^ Williamson AM, Feyer AM (October 2000). "Moderate sleep deprivation produces impairments in cognitive and motor performance equivalent to legally prescribed levels of alcohol intoxication". Occupational and Environmental Medicine. 57 (10): 649–655. doi:10.1136/oem.57.10.649. PMC 1739867. PMID 10984335.
  47. ^ Dawson D, Reid K (July 1997). "Fatigue, alcohol and performance impairment". Nature. 388 (6639): 235. Bibcode:1997Natur.388..235D. doi:10.1038/40775. PMID 9230429.
  48. ^ "Drowsy Driving:Key Messages and Talking Points" (PDF). National Sleep Foundation. 2 December 2009. Archived (PDF) from the original on 26 November 2013.
  49. ^ "Fact Sheet – Pilot Fatigue". Federal Aviation Administration. 10 September 2010. Archived from the original on 5 October 2016.
  50. ^ Baldwin DC, Daugherty SR (March 2004). "Sleep deprivation and fatigue in residency training: results of a national survey of first- and second-year residents". Sleep. 27 (2): 217–223. doi:10.1093/sleep/27.2.217. PMID 15124713.
  51. ^ Engle-Friedman M, Riela S, Golan R, Ventuneac AM, Davis CM, Jefferson AD, et al. (June 2003). "The effect of sleep loss on next day effort". Journal of Sleep Research. 12 (2): 113–124. doi:10.1046/j.1365-2869.2003.00351.x. PMID 12753348.
  52. ^ Engle-Friedman M, Palencar V, Riela S (June 2010). "Sleep and effort in adolescent athletes". Journal of Child Health Care. 14 (2): 131–141. doi:10.1177/1367493510362129. PMID 20435615.
  53. ^ Whitmire AM, Leveton LB, Barger L, Brainard G, Dinges DF, Klerman E, et al. "Risk of Performance Errors due to Sleep Loss, Circadian Desynchronization, Fatigue, and Work Overload" (PDF). Human Health and Performance Risks of Space Exploration Missions: Evidence reviewed by the NASA Human Research Program. Archived (PDF) from the original on 15 February 2012. Retrieved 25 June 2012.
  54. ^ Kolb B, Whishaw I (2014). An Introduction to Brain and Behavior (4th ed.). New York, New York: Worth Publishers. pp. 468–469. ISBN 978-1-4292-4228-8.
  55. ^ Kramer M, Roehrs T, Roth T (January 1976). "Mood change and the physiology of sleep". Comprehensive Psychiatry. 17 (1): 161–165. doi:10.1016/0010-440x(76)90065-1. PMID 174865.
  56. ^ a b "Sleep and Mood | Need Sleep". healthysleep.med.harvard.edu. Archived from the original on 21 March 2021. Retrieved 21 January 2021.
  57. ^ Dinges DF, Pack F, Williams K, Gillen KA, Powell JW, Ott GE, et al. (April 1997). "Cumulative sleepiness, mood disturbance, and psychomotor vigilance performance decrements during a week of sleep restricted to 4-5 hours per night". Sleep. 20 (4): 267–277. PMID 9231952.
  58. ^ "Depression and Sleep". Sleep Foundation. 18 September 2020. Retrieved 21 January 2021.
  59. ^ Franzen PL, Buysse DJ (2008). "Sleep disturbances and depression: risk relationships for subsequent depression and therapeutic implications". Dialogues in Clinical Neuroscience. 10 (4): 473–481. doi:10.31887/DCNS.2008.10.4/plfranzen. PMC 3108260. PMID 19170404.
  60. ^ Nutt D, Wilson S, Paterson L (2008). "Sleep disorders as core symptoms of depression". Dialogues in Clinical Neuroscience. 10 (3): 329–336. doi:10.31887/DCNS.2008.10.3/dnutt. PMC 3181883. PMID 18979946.
  61. ^ Pires GN, Bezerra AG, Tufik S, Andersen ML (August 2016). "Effects of acute sleep deprivation on state anxiety levels: a systematic review and meta-analysis". Sleep Medicine. 24: 109–118. doi:10.1016/j.sleep.2016.07.019. PMID 27810176.
  62. ^ Selvi Y, Gulec M, Agargun MY, Besiroglu L (September 2007). "Mood changes after sleep deprivation in morningness–eveningness chronotypes in healthy individuals". Journal of Sleep Research. 16 (3): 241–244. doi:10.1111/j.1365-2869.2007.00596.x. PMID 17716271.
  63. ^ Balter LJ, Axelsson J (27 March 2024). "Sleep and subjective age: protect your sleep if you want to feel young". Proceedings of the Royal Society B: Biological Sciences. 291 (2019). The Royal Society. doi:10.1098/rspb.2024.0171. PMC 10965331. PMID 38531399.
  64. ^ Stephan Y, Sutin AR, Bayard S, Terracciano A (2 September 2017). "Subjective age and sleep in middle-aged and older adults". Psychology & Health. 32 (9): 1140–1151. doi:10.1080/08870446.2017.1324971. PMID 28480746.
  65. ^ Yoon JE, Oh D, Hwang I, Park JA, Im HJ, Thomas RJ, et al. (3 September 2023). "Association between older subjective age and poor sleep quality: a population-based study". Behavioral Sleep Medicine. 21 (5): 585–600. doi:10.1080/15402002.2022.2144860. PMID 36377789.
  66. ^ "Consequences of Fatigue from Insufficient Sleep". Commercial Motor Vehicle Driver Fatigue, Long-Term Health, and Highway Safety: Research Needs. National Academies Press (US). 12 August 2016.
  67. ^ Kayser KC, Puig VA, Estepp JR (2022). "Predicting and mitigating fatigue effects due to sleep deprivation: A review". Frontiers in Neuroscience. 16. doi:10.3389/fnins.2022.930280. PMC 9389006. PMID 35992930.
  68. ^ Schulz H, Bes E, Jobert M (1998). "Modelling sleep propensity and sleep disturbances.". Sleep—Wake Disorders. Boston, MA: Springer US. pp. 11–26. doi:10.1007/978-1-4899-0245-0_2. ISBN 978-1-4899-0247-4.
  69. ^ a b c d e f g h Durmer JS, Dinges DF (March 2005). "Neurocognitive consequences of sleep deprivation". Seminars in Neurology. 25 (1): 117–129. doi:10.1055/s-2005-867080. PMC 3564638. PMID 15798944.
  70. ^ Saper CB, Chou TC, Scammell TE (December 2001). "The sleep switch: hypothalamic control of sleep and wakefulness". Trends in Neurosciences. 24 (12): 726–731. doi:10.1016/S0166-2236(00)02002-6. PMID 11718878.
  71. ^ a b Borbély AA, Daan S, Wirz-Justice A, Deboer T (April 2016). "The two-process model of sleep regulation: a reappraisal". Journal of Sleep Research. 25 (2): 131–143. doi:10.1111/jsr.12371. PMID 26762182.
  72. ^ "What You Should Know About Microsleep".
  73. ^ Skorucak J, Hertig-Godeschalk A, Schreier DR, Malafeev A, Mathis J, Achermann P (January 2020). "Automatic detection of microsleep episodes with feature-based machine learning". Sleep. 43 (1): zsz225. doi:10.1093/sleep/zsz225. hdl:20.500.11850/391781. PMID 31559424.
  74. ^ "Glossary K-M". Get Sleep. Harvard Medical School. 2012. Archived from the original on 2 April 2015.
  75. ^ "Microsleep | Microsleeps". www.sleepdex.org. Archived from the original on 3 March 2016. Retrieved 14 February 2016.
  76. ^ Vyazovskiy VV, Olcese U, Hanlon EC, Nir Y, Cirelli C, Tononi G (April 2011). "Local sleep in awake rats". Nature. 472 (7344): 443–447. Bibcode:2011Natur.472..443V. doi:10.1038/nature10009. PMC 3085007. PMID 21525926.
  77. ^ "CDC - Sleep and Chronic Disease - Sleep and Sleep Disorders". www.cdc.gov. 13 February 2019. Retrieved 21 January 2021.
  78. ^ Knutson KL, Van Cauter E, Rathouz PJ, Yan LL, Hulley SB, Liu K, et al. (June 2009). "Association between sleep and blood pressure in midlife: the CARDIA sleep study". Archives of Internal Medicine. 169 (11): 1055–1061. doi:10.1001/archinternmed.2009.119. PMC 2944774. PMID 19506175.
  79. ^ King CR, Knutson KL, Rathouz PJ, Sidney S, Liu K, Lauderdale DS (December 2008). "Short sleep duration and incident coronary artery calcification". JAMA. 300 (24): 2859–2866. doi:10.1001/jama.2008.867. PMC 2661105. PMID 19109114.
  80. ^ Sabanayagam C, Shankar A (August 2010). "Sleep duration and cardiovascular disease: results from the National Health Interview Survey". Sleep. 33 (8): 1037–1042. doi:10.1093/sleep/33.8.1037. PMC 2910533. PMID 20815184.
  81. ^ St-Onge MP, Grandner MA, Brown D, Conroy MB, Jean-Louis G, Coons M, et al. (November 2016). "Sleep Duration and Quality: Impact on Lifestyle Behaviors and Cardiometabolic Health: A Scientific Statement From the American Heart Association". Circulation. 134 (18): e367 – e386. doi:10.1161/CIR.0000000000000444. PMC 5567876. PMID 27647451.
  82. ^ "CDC - Data and Statistics - Sleep and Sleep Disorders". www.cdc.gov. 5 March 2019. Retrieved 21 January 2021.
  83. ^ Deng HB, Tam T, Zee BC, Chung RY, Su X, Jin L, et al. (October 2017). "Short Sleep Duration Increases Metabolic Impact in Healthy Adults: A Population-Based Cohort Study". Sleep. 40 (10). doi:10.1093/sleep/zsx130. PMID 28977563.
  84. ^ Daghlas I, Dashti HS, Lane J, Aragam KG, Rutter MK, Saxena R, et al. (September 2019). "Sleep Duration and Myocardial Infarction". Journal of the American College of Cardiology. 74 (10): 1304–1314. doi:10.1016/j.jacc.2019.07.022. PMC 6785011. PMID 31488267.
  85. ^ a b c "Sleep & Immunity: Can a Lack of Sleep Make You Sick?". Sleep Foundation. 26 October 2018. Retrieved 21 January 2021.
  86. ^ Irwin MR (November 2019). "Sleep and inflammation: partners in sickness and in health". Nature Reviews. Immunology. 19 (11): 702–715. doi:10.1038/s41577-019-0190-z. PMID 31289370.
  87. ^ "睡眠好坏直接影响免疫力--健康·生活--人民网". health.people.com.cn. Retrieved 5 December 2023.
  88. ^ Prather AA, Janicki-Deverts D, Hall MH, Cohen S (September 2015). "Behaviorally Assessed Sleep and Susceptibility to the Common Cold". Sleep. 38 (9): 1353–1359. doi:10.5665/sleep.4968. PMC 4531403. PMID 26118561.
  89. ^ Pisani MA, Friese RS, Gehlbach BK, Schwab RJ, Weinhouse GL, Jones SF (April 2015). "Sleep in the intensive care unit". American Journal of Respiratory and Critical Care Medicine. 191 (7): 731–738. doi:10.1164/rccm.201411-2099CI. PMC 5447310. PMID 25594808.
  90. ^ Van Cauter E, Spiegel K (1999). "Sleep as a mediator of the relationship between socioeconomic status and health: a hypothesis". Annals of the New York Academy of Sciences. 896 (1): 254–261. Bibcode:1999NYASA.896..254V. doi:10.1111/j.1749-6632.1999.tb08120.x. PMID 10681902.
  91. ^ a b Taheri S, Lin L, Austin D, Young T, Mignot E (December 2004). "Short sleep duration is associated with reduced leptin, elevated ghrelin, and increased body mass index". PLOS Medicine. 1 (3): e62. doi:10.1371/journal.pmed.0010062. PMC 535701. PMID 15602591.
  92. ^ "The Link Between Obesity and Sleep Deprivation". Sleep Foundation. 4 December 2020. Retrieved 21 January 2021.
  93. ^ Everson CA, Bergmann BM, Rechtschaffen A (February 1989). "Sleep deprivation in the rat: III. Total sleep deprivation". Sleep. 12 (1): 13–21. doi:10.1093/sleep/12.1.13. PMID 2928622.
  94. ^ "Sleep and Disease Risk". Healthy Sleep. Harvard Medical School. 2007. Archived from the original on 25 March 2016.
  95. ^ "Diabetes and Sleep: Sleep Disturbances & Coping". Sleep Foundation. 20 November 2020. Retrieved 21 January 2021.
  96. ^ Gottlieb DJ, Punjabi NM, Newman AB, Resnick HE, Redline S, Baldwin CM, et al. (April 2005). "Association of sleep time with diabetes mellitus and impaired glucose tolerance". Archives of Internal Medicine. 165 (8): 863–867. doi:10.1001/archinte.165.8.863. PMID 15851636.
  97. ^ Spiegel K, Leproult R, Van Cauter E (October 1999). "Impact of sleep debt on metabolic and endocrine function". Lancet. 354 (9188): 1435–1439. doi:10.1016/S0140-6736(99)01376-8. PMID 10543671.
  98. ^ a b c d e "Sleep deprivation". betterhealth.vic.gov.au. Archived from the original on 20 August 2009.
  99. ^ Morin CM (2003). Insomnia. New York: Kluwer Academic/Plenum Publ. p. 28 death. ISBN 978-0-306-47750-8.
  100. ^ a b "Brain Basics: Understanding Sleep". National Institute of Neurological Disorders and Stroke. Archived from the original on 11 October 2007.
  101. ^ a b Ohayon MM, Priest RG, Caulet M, Guilleminault C (October 1996). "Hypnagogic and hypnopompic hallucinations: pathological phenomena?". The British Journal of Psychiatry. 169 (4): 459–467. doi:10.1192/bjp.169.4.459. PMID 8894197.
  102. ^ Smith AP (1992). Handbook of Human Performance. London: Acad. Press. p. 240. ISBN 978-0-12-650352-4.
  103. ^ a b c d "Harvard Heart Letter examines the costs of not getting enough sleep – Harvard Health Publications". Health.harvard.edu. 31 May 2012. Archived from the original on 9 May 2011. Retrieved 13 August 2012.
  104. ^ Olson E (9 June 2015). "Lack of sleep: Can it make you sick?". Mayo Clinic. Retrieved 26 August 2018.
  105. ^ "The Role of Magnesium in Fibromyalgia". Web.mit.edu. Archived from the original on 29 July 2012. Retrieved 13 August 2012.
  106. ^ Citek K, Ball B, Rutledge DA (November 2003). "Nystagmus testing in intoxicated individuals". Optometry. 74 (11): 695–710. PMID 14653658.
  107. ^ Engel J, Pedley TA, Aicardi J (2008). Epilepsy: A Comprehensive Textbook - Google Books. Lippincott Williams & Wilkins. ISBN 978-0-7817-5777-5. Retrieved 30 January 2015.
  108. ^ Wehr TA (October 1991). "Sleep-Loss as a Possible Mediator of Diverse Causes of Mania". British Journal of Psychiatry. 159 (4): 576–578. doi:10.1192/bjp.159.4.576. PMID 1751874.
  109. ^ "Sleep deprivation - Better Health Channel". 20 August 2009. Archived from the original on 20 August 2009. Retrieved 24 October 2019.
  110. ^ "Tachycardia - Symptoms and causes". Mayo Clinic. Retrieved 27 June 2022.
  111. ^ Rangaraj VR, Knutson KL (February 2016). "Association between sleep deficiency and cardiometabolic disease: implications for health disparities". Sleep Medicine. 18: 19–35. doi:10.1016/j.sleep.2015.02.535. PMC 4758899. PMID 26431758.
  112. ^ Vaughn MG, Salas-Wright CP, White NA, Kremer KP (2015). "Poor sleep and reactive aggression: Results from a national sample of African American adults". Journal of Psychiatric Research. 66–67: 54–59. doi:10.1016/j.jpsychires.2015.04.015. PMID 25940021.
  113. ^ "Neural Link Between Sleep Loss And Psychiatric Disorders". ts-si.org. 24 October 2007. Archived from the original on 28 February 2009.
  114. ^ Chan-Ob T, Boonyanaruthee V (September 1999). "Meditation in association with psychosis". Journal of the Medical Association of Thailand = Chotmaihet Thangphaet. 82 (9): 925–930. PMID 10561951.
  115. ^ Devillières P, Opitz M, Clervoy P, Stephany J (May–June 1996). "[Delusion and sleep deprivation]". L'Encephale. 22 (3): 229–231. PMID 8767052.
  116. ^ "Here's What Happens When You Don't Get Enough Sleep (And How Much You Really Need a Night)". Cleveland Clinic. 25 March 2022. Retrieved 17 April 2022.
  117. ^ Zaharna M, Guilleminault C (2010). "Sleep, noise and health: Review". Noise and Health. 12 (47): 64. doi:10.4103/1463-1741.63205.
  118. ^ Touitou Y, Reinberg A, Touitou D (March 2017). "Association between light at night, melatonin secretion, sleep deprivation, and the internal clock: Health impacts and mechanisms of circadian disruption". Life Sciences. 173: 94–106. doi:10.1016/j.lfs.2017.02.008.
  119. ^ Kushida CA, ed. (2004). "Environmental Influences on Sleep and Sleep Deprivation". Sleep Deprivation. pp. 148–183. doi:10.1201/b14428-11. ISBN 978-0-429-22511-6.
  120. ^ Schmidt-Kessen W, Kendel K (September 1973). "Einfluß der Raumtemperatur auf den Nachtschlaf" [The influence of room temperature on night-sleep in man]. Research in Experimental Medicine (in German). 160 (3): 220–233. doi:10.1007/bf01856786. PMID 4350670.
  121. ^ Morphy H, Dunn KM, Lewis M, Boardman HF, Croft PR (March 2007). "Epidemiology of insomnia: a longitudinal study in a UK population". Sleep. 30 (3): 274–280. PMID 17425223.
  122. ^ Kim K, Uchiyama M, Okawa M, Liu X, Ogihara R (February 2000). "An epidemiological study of insomnia among the Japanese general population". Sleep. 23 (1): 41–47. doi:10.1093/sleep/23.1.1a. PMID 10678464.
  123. ^ Rajaee Rizi F, Asgarian FS (January 2023). "Reliability, validity, and psychometric properties of the Persian version of the Tayside children's sleep questionnaire". Sleep and Biological Rhythms. 21 (1): 97–103. doi:10.1007/s41105-022-00420-6. PMC 10899986. PMID 38468908.
  124. ^ a b "Dyssomnias" (PDF). WHO. pp. 7–11. Archived (PDF) from the original on 18 March 2009. Retrieved 25 January 2009.
  125. ^ Buysse DJ (June 2008). "Chronic insomnia". The American Journal of Psychiatry. 165 (6): 678–686. doi:10.1176/appi.ajp.2008.08010129. PMC 2859710. PMID 18519533. For this reason, the NIH conference [of 2005] commended the term "comorbid insomnia" as a preferable alternative to the term "secondary insomnia."
  126. ^ Erman MK (2007). "Insomnia: Comorbidities and Consequences". Primary Psychiatry. 14 (6): 31–35. Archived from the original on 15 July 2011. Two general categories of insomnia exist, primary insomnia and comorbid insomnia.
  127. ^ World Health Organization (2007). "Quantifying burden of disease from environmental noise" (PDF). p. 20. Archived (PDF) from the original on 23 November 2010. Retrieved 22 September 2010.
  128. ^ Lai C, Qiu H (June 2017). "Paradoxical Insomnia: Misperception of Sleep Can Be a Tormenting Experience". American Family Physician. 95 (12): 770. PMID 28671423. Retrieved 10 May 2020.
  129. ^ Biological Rhythms, Sleep and Hypnosis by Simon Green
  130. ^ McCrae CS, Lichstein KL (February 2001). "Secondary insomnia: diagnostic challenges and intervention opportunities". Sleep Medicine Reviews. 5 (1): 47–61. doi:10.1053/smrv.2000.0146. PMID 12531044.
  131. ^ a b "Obstructive sleep apnea - Symptoms and causes". Mayo Clinic. Retrieved 17 April 2022.
  132. ^ a b Shaik L, Cheema MS, Subramanian S, Kashyap R, Surani SR (24 November 2022). "Sleep and Safety among Healthcare Workers: The Effect of Obstructive Sleep Apnea and Sleep Deprivation on Safety". Medicina. 58 (12): 1723. doi:10.3390/medicina58121723. PMC 9788062. PMID 36556925.
  133. ^ Zammit GK (1997). Good nights : how to stop sleep deprivation, overcome insomnia, and get the sleep you need. Zanca, Jane A. Kansas City: Andrews and McMeel. ISBN 0-8362-2188-5. OCLC 35849087.
  134. ^ Spicuzza L, Caruso D, Di Maria G (September 2015). "Obstructive sleep apnoea syndrome and its management". Therapeutic Advances in Chronic Disease. 6 (5): 273–85. doi:10.1177/2040622315590318. PMC 4549693. PMID 26336596.
  135. ^ Muza RT (May 2015). "Central sleep apnoea-a clinical review". Journal of Thoracic Disease. 7 (5): 930–937. doi:10.3978/j.issn.2072-1439.2015.04.45. PMC 4454847. PMID 26101651.
  136. ^ "Revenge Bedtime Procrastination: Definition & Psychology". Sleep Foundation. 23 February 2021. Retrieved 13 March 2024.
  137. ^ a b O'Callaghan F, Muurlink O, Reid N (December 2018). "Effects of caffeine on sleep quality and daytime functioning". Risk Management and Healthcare Policy. 11: 263–271. doi:10.2147/rmhp.s156404. PMC 6292246. PMID 30573997.
  138. ^ Chaudhary NS, Grandner MA, Jackson NJ, Chakravorty S (1 November 2016). "Caffeine consumption, insomnia, and sleep duration: Results from a nationally representative sample". Nutrition. 32 (11–12): 1193–1199. doi:10.1016/j.nut.2016.04.005. PMC 6230475. PMID 27377580.
  139. ^ "Caffeine's Connection to Sleep Problems". Sleep Foundation. 17 April 2009. Retrieved 17 April 2022.
  140. ^ "National Sleep Foundation Key Messages/Talking Points" (PDF). Archived (PDF) from the original on 18 April 2016. Retrieved 18 April 2016.
  141. ^ Schroeder J (7 December 2018). "Students Who Sleep 8 Hours Score Higher On Final Exams". The University Network. Retrieved 10 December 2018.
  142. ^ Hershner SD, Chervin RD (23 June 2014). "Causes and consequences of sleepiness among college students". Nature and Science of Sleep. 6: 73–84. doi:10.2147/NSS.S62907. PMC 4075951. PMID 25018659.
  143. ^ Estevan I, Sardi R, Tejera AC, Silva A, Tassino B (10 March 2021). "Should I study or should I go (to sleep)? The influence of test schedule on the sleep behavior of undergraduates and its association with performance". PLOS ONE. 16 (3): e0247104. Bibcode:2021PLoSO..1647104E. doi:10.1371/journal.pone.0247104. PMC 7946303. PMID 33690625.
  144. ^ Tsai LL, Li SP (February 2004). "Sleep patterns in college students". Journal of Psychosomatic Research. 56 (2): 231–237. doi:10.1016/S0022-3999(03)00507-5. PMID 15016583.
  145. ^ a b Kelley P, Lockley SW, Foster RG, Kelley J (1 August 2014). "Synchronizing education to adolescent biology: 'let teens sleep, start school later'". Learning, Media and Technology. 40 (2): 220. doi:10.1080/17439884.2014.942666.
  146. ^ Carpenter S (2001). "Sleep deprivation may be undermining teen health". Monitor on Psychology. 32 (9): 42. Archived from the original on 6 October 2006.
  147. ^ Schmid RE (28 March 2006). "Sleep-deprived teens dozing off at school". ABC News. Associated Press. Archived from the original on 8 December 2006.
  148. ^ Giedd JN (October 2009). "Linking adolescent sleep, brain maturation, and behavior". The Journal of Adolescent Health. 45 (4): 319–320. doi:10.1016/j.jadohealth.2009.07.007. PMC 3018343. PMID 19766933.
  149. ^ Benca RM (November 1996). "Sleep in psychiatric disorders". Neurologic Clinics. 14 (4): 739–764. doi:10.1016/s0733-8619(05)70283-8. PMID 8923493.
  150. ^ McKenna BS, Eyler LT (November 2012). "Overlapping prefrontal systems involved in cognitive and emotional processing in euthymic bipolar disorder and following sleep deprivation: a review of functional neuroimaging studies". Clinical Psychology Review. 32 (7): 650–663. doi:10.1016/j.cpr.2012.07.003. PMC 3922056. PMID 22926687.
  151. ^ Young JW, Dulcis D (July 2015). "Investigating the mechanism(s) underlying switching between states in bipolar disorder". European Journal of Pharmacology. 759: 151–162. doi:10.1016/j.ejphar.2015.03.019. PMC 4437855. PMID 25814263.
  152. ^ Wehr TA, Sack DA, Rosenthal NE (February 1987). "Sleep reduction as a final common pathway in the genesis of mania". The American Journal of Psychiatry. 144 (2): 201–204. doi:10.1176/ajp.144.2.201. PMID 3812788.
  153. ^ American Psychiatry Association (2013). Diagnostic and Statistical Manual of Mental Disorders (5th ed.). Arlington: American Psychiatric Publishing. pp. 123–154. ISBN 978-0-89042-555-8.
  154. ^ Pocivavsek A, Rowland LM (January 2018). "Basic Neuroscience Illuminates Causal Relationship Between Sleep and Memory: Translating to Schizophrenia". Schizophrenia Bulletin. 44 (1): 7–14. doi:10.1093/schbul/sbx151. PMC 5768044. PMID 29136236.
  155. ^ Wesselius HM, van den Ende ES, Alsma J, Ter Maaten JC, Schuit SC, Stassen PM, et al. (September 2018). "Quality and Quantity of Sleep and Factors Associated With Sleep Disturbance in Hospitalized Patients". JAMA Internal Medicine. 178 (9): 1201–1208. doi:10.1001/jamainternmed.2018.2669. PMC 6142965. PMID 30014139.
  156. ^ Shilo L, Dagan Y, Smorjik Y, Weinberg U, Dolev S, Komptel B, et al. (May 1999). "Patients in the intensive care unit suffer from severe lack of sleep associated with loss of normal melatonin secretion pattern". The American Journal of the Medical Sciences. 317 (5): 278–281. doi:10.1016/s0002-9629(15)40528-2. PMID 10334113.
  157. ^ Tan X, van Egmond L, Partinen M, Lange T, Benedict C (July 2019). "A narrative review of interventions for improving sleep and reducing circadian disruption in medical inpatients". Sleep Medicine. 59: 42–50. doi:10.1016/j.sleep.2018.08.007. PMID 30415906.
  158. ^ "Broadband internet causes sleep deprivation, a new study finds". ScienceDaily (Press release). Bocconi University. 2 August 2018.
  159. ^ Alshobaili FA, AlYousefi NA (June 2019). "The effect of smartphone usage at bedtime on sleep quality among Saudi non- medical staff at King Saud University Medical City". Journal of Family Medicine and Primary Care. 8 (6): 1953–1957. doi:10.4103/jfmpc.jfmpc_269_19. PMC 6618184. PMID 31334161.
  160. ^ Costa G (2015). "Sleep deprivation due to shift work". Occupational Neurology. Handbook of Clinical Neurology. Vol. 131. pp. 437–446. doi:10.1016/B978-0-444-62627-1.00023-8. ISBN 978-0-444-62627-1. PMID 26563802.
  161. ^ Malik A (1 May 2020). "Correlation Between Shiftwork, Sleep & Fatigue and Increased Occupational Injuries in a Manufacturing Plant in Pakistan" (PDF).
  162. ^ a b Maski K (7 September 2023). Scammell TE, Eichler AF (eds.). "Insufficient sleep: Evaluation and management". UpToDate. Retrieved 28 January 2021.
  163. ^ Carney CE, Buysse DJ, Ancoli-Israel S, Edinger JD, Krystal AD, Lichstein KL, et al. (February 2012). "The consensus sleep diary: standardizing prospective sleep self-monitoring". Sleep. 35 (2): 287–302. doi:10.5665/sleep.1642. PMC 3250369. PMID 22294820.
  164. ^ "Sleep Deprivation: Causes, Symptoms, & Treatment". Sleep Foundation. 3 November 2020. Retrieved 21 January 2021.
  165. ^ Monk TH, Buysse DJ, Kennedy KS, Pods JM, DeGrazia JM, Miewald JM (March 2003). "Measuring sleep habits without using a diary: the sleep timing questionnaire". Sleep. 26 (2): 208–212. doi:10.1093/sleep/26.2.208. PMID 12683481.
  166. ^ Rizi FR, Asgarian FS (January 2023). "Reliability, validity, and psychometric properties of the Persian version of the Tayside children's sleep questionnaire". Sleep and Biological Rhythms. 21 (1): 97–103. doi:10.1007/s41105-022-00420-6. PMC 10899986. PMID 38468908.
  167. ^ "Actigraphy". stanfordhealthcare.org. Retrieved 21 January 2021.
  168. ^ Morgenthaler T, Alessi C, Friedman L, Owens J, Kapur V, Boehlecke B, et al. (April 2007). "Practice parameters for the use of actigraphy in the assessment of sleep and sleep disorders: an update for 2007". Sleep. 30 (4): 519–529. doi:10.1093/sleep/30.4.519. PMID 17520797.
  169. ^ Smith MT, McCrae CS, Cheung J, Martin JL, Harrod CG, Heald JL, et al. (July 2018). "Use of Actigraphy for the Evaluation of Sleep Disorders and Circadian Rhythm Sleep-Wake Disorders: An American Academy of Sleep Medicine Clinical Practice Guideline". Journal of Clinical Sleep Medicine. 14 (7): 1231–1237. doi:10.5664/jcsm.7230. PMC 6040807. PMID 29991437.
  170. ^ Smith MT, McCrae CS, Cheung J, Martin JL, Harrod CG, Heald JL, et al. (July 2018). "Use of Actigraphy for the Evaluation of Sleep Disorders and Circadian Rhythm Sleep-Wake Disorders: An American Academy of Sleep Medicine Systematic Review, Meta-Analysis, and GRADE Assessment". Journal of Clinical Sleep Medicine. 14 (7): 1209–1230. doi:10.5664/jcsm.7228. PMC 6040804. PMID 29991438.
  171. ^ Zambotti M, Cellini N, Goldstone A, Colrain IM, Baker C (2020). "Wearable Sleep Technology in Clinical and Research Settings". Medicine and Science in Sports and Exercise. 51 (7): 1538–1557. doi:10.1249/MSS.0000000000001947. PMC 6579636. PMID 30789439.
  172. ^ a b Irish LA, Kline CE, Gunn HE, Buysse DJ, Hall MH (August 2015). "The role of sleep hygiene in promoting public health: A review of empirical evidence". Sleep Medicine Reviews. 22: 23–36. doi:10.1016/j.smrv.2014.10.001. PMC 4400203. PMID 25454674.
  173. ^ a b c Edinger JD, Arnedt JT, Bertisch SM, Carney CE, Harrington JJ, Lichstein KL, et al. (February 2021). "Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline". Journal of Clinical Sleep Medicine. 17 (2): 255–262. doi:10.5664/jcsm.8986. PMC 7853203. PMID 33164742.
  174. ^ "How to Sleep Better". Sleep Foundation. 17 April 2009. Retrieved 14 January 2021.
  175. ^ "CDC - Sleep Hygiene Tips - Sleep and Sleep Disorders". www.cdc.gov. 13 February 2019. Retrieved 21 April 2020.
  176. ^ a b Trauer JM, Qian MY, Doyle JS, Rajaratnam SM, Cunnington D (August 2015). "Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis". Annals of Internal Medicine. 163 (3): 191–204. doi:10.7326/M14-2841. PMID 26054060.
  177. ^ "Sleep Deprivation" (PDF). American Academy of Sleep Medicine. 2008. Archived (PDF) from the original on 26 February 2015. Retrieved 25 March 2015.
  178. ^ "Sleep Deprivation Fact Sheet" (PDF). American Academy of Sleep Medicine. 2 December 2009. Archived (PDF) from the original on 26 February 2015.
  179. ^ Carlson N (2013). Physiology of Behavior (11th ed.). Boston: Pearson. pp. 578–579. ISBN 978-0-205-23939-9.
  180. ^ Gorgulu Y, Caliyurt O (September 2009). "Rapid antidepressant effects of sleep deprivation therapy correlates with serum BDNF changes in major depression". Brain Research Bulletin. 80 (3): 158–162. doi:10.1016/j.brainresbull.2009.06.016. PMID 19576267.
  181. ^ Davies SK, Ang JE, Revell VL, Holmes B, Mann A, Robertson FP, et al. (July 2014). "Effect of sleep deprivation on the human metabolome". Proceedings of the National Academy of Sciences of the United States of America. 111 (29): 10761–10766. Bibcode:2014PNAS..11110761D. doi:10.1073/pnas.1402663111. PMC 4115565. PMID 25002497.
  182. ^ Wirz-Justice A, Van den Hoofdakker RH (August 1999). "Sleep deprivation in depression: what do we know, where do we go?". Biological Psychiatry. 46 (4): 445–453. doi:10.1016/S0006-3223(99)00125-0. PMID 10459393.
  183. ^ Wirz-Justice A, Benedetti F, Berger M, Lam RW, Martiny K, Terman M, et al. (July 2005). "Chronotherapeutics (light and wake therapy) in affective disorders". Psychological Medicine. 35 (7): 939–944. doi:10.1017/S003329170500437X (inactive 1 November 2024). PMID 16045060.{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
  184. ^ "Disorders That Disrupt Sleep (Parasomnias)". eMedicineHealth. Archived from the original on 22 December 2005.
  185. ^ a b c d Perlis M, Gehrman P (2013), "Psychophysiological Insomnia", Encyclopedia of Sleep, Elsevier, pp. 203–204, doi:10.1016/b978-0-12-378610-4.00177-7, ISBN 978-0-12-378611-1
  186. ^ a b Miller CB, Espie CA, Epstein DR, Friedman L, Morin CM, Pigeon WR, et al. (October 2014). "The evidence base of sleep restriction therapy for treating insomnia disorder". Sleep Medicine Reviews. 18 (5): 415–424. doi:10.1016/j.smrv.2014.01.006. PMID 24629826.
  187. ^ "中国失眠症诊断和治疗指南" [Guidelines for Diagnosis and Treatment of Insomnia in China]. National Medical Journal of China (in Chinese). 97 (24): 1844–1856. 27 June 2017. doi:10.3760/cma.j.issn.0376-2491.2017.24.002.
  188. ^ a b Irving D (1 March 2017). "The Costs of Poor Sleep Are Staggering". RAND.
  189. ^ a b Troxel W, Shih R, Pedersen E, Geyer L, Fisher M, Griffin BA, et al. (2015). Improving Sleep Health for U.S. Servicemembers: Policies, Programs, Barriers to Implementation, and Recommendations. doi:10.7249/rb9824. ISBN 978-0-8330-8851-2.
  190. ^ Eriksson M, Juárez G (2017). "The Biopolitics of Melanopic Illuminance" (PDF). Scapegoat (10). Archived from the original (PDF) on 5 September 2021.
  191. ^ Crary J (2014). 24/7: late capitalism and the ends of sleep. London: Verso. ISBN 978-1-78168-310-1.
  192. ^ Guo JH, Ma XH, Ma H, Zhang Y, Tian ZQ, Wang X, et al. (August 2020). "Circadian misalignment on submarines and other non-24-h environments - from research to application". Military Medical Research. 7 (1): 39. doi:10.1186/s40779-020-00268-2. PMC 7437048. PMID 32814592.
  193. ^ "Sleep Deprivation Used as Abuse Tactic". DomesticShelters.org. Retrieved 31 January 2023.
  194. ^ "Family and Domestic Violence - Healthy Work Healthy Living Tip Sheet". Archived from the original on 19 May 2019. Retrieved 21 January 2019.
  195. ^ "Binyam Mohamed torture appeal lost by UK government..." BBC News. 2 October 2009. Archived from the original on 11 February 2010.
  196. ^ Begin M (1979). White nights: the story of a prisoner in Russia. San Francisco: Harper & Row. ISBN 978-0-06-010289-0.
  197. ^ "HUDOC - European Court of Human Rights". hudoc.echr.coe.int. Retrieved 31 January 2023.
  198. ^ a b Miller G, Meyer J (17 April 2009). "Obama assures intelligence officials they won't be prosecuted over interrogations". Los Angeles Times. Retrieved 10 July 2016.
  199. ^ Bradbury SG (10 May 2005). "Memorandum for John Rizzo" (PDF). ACLU. p. 14. Archived from the original (PDF) on 6 November 2011. Retrieved 24 October 2011.
  200. ^ Scherer M (21 April 2009). "Scientists Claim CIA Misused Work on Sleep Deprivation". Time. Retrieved 2 February 2017.
  201. ^ "Explaining and Authorizing Specific Interrogation Techniques". The New York Times. 17 April 2009. Archived from the original on 19 October 2017.
  202. ^ Department of Justice Office of Professional Responsibility (29 July 2009). Investigation into the Office of Legal Counsel's Memoranda Concerning Issues Relating to the Central Intelligence Agency's Use of "Enhanced Interrogation Techniques" on Suspected Terrorists (PDF) (Report). United States Department of Justice. pp. 133–138. Retrieved 29 May 2017.
  203. ^ Hassan T (3 October 2006). "Sleep deprivation remains red-hot question". PM. abc.net.au. Archived from the original on 11 October 2007.
  204. ^ "Sleep deprivation is torture: Amnesty". The Sydney Morning Herald. AAP. 3 October 2006. Archived from the original on 27 October 2007.
  205. ^ "National Geographic". National Geographic. Retrieved 31 January 2023.
  206. ^ Fackelmann K (25 November 2007). "Study: Sleep deficit may be impossible to make up". USA Today. Archived from the original on 28 June 2012.
  207. ^ Horne J (September 2004). "Is there a sleep debt?". Sleep. 27 (6): 1047–1049. PMID 15532195.
  208. ^ "National Time Use Studies (1965–1985)". umd.edu. Archived from the original on 7 September 2006.
  209. ^ "National Time Use Studies (1998 - 2001)". umd.edu. Archived from the original on 7 September 2006.
  210. ^ a b Coren S (1 March 1998). "Sleep Deprivation, Psychosis and Mental Efficiency". Psychiatric Times. 15 (3). Archived from the original on 4 September 2009. Retrieved 25 November 2009.
  211. ^ a b Boese A (5 November 2007). "Eleven days awake". Elephants on Acid: And Other Bizarre Experiments. Harvest Books. pp. 90–93. ISBN 978-0-15-603135-6. Archived from the original on 19 September 2014.
  212. ^ Ross JJ (April 1965). "Neurological Findings After Prolonged Sleep Deprivation". Archives of Neurology. 12 (4): 399–403. doi:10.1001/archneur.1965.00460280069006. PMID 14264871.
  213. ^ Thao VP. "Vietnam man handles three decades without sleep". Thanh Nien Daily. Vietnam National Youth Federation. Archived from the original on 13 May 2008. Retrieved 26 May 2008.
  214. ^ "Ukrainian man has been lacking sleep for 20 years". 15 January 2005. Archived from the original on 5 October 2016. Retrieved 5 October 2016.
  215. ^ Childs D (30 March 2009). "11 Baffling Medical Conditions". ABC News. The Boy Who Couldn't Sleep.
  216. ^ "Matters of dispute – Sleepless in Ukraine". The Guardian. 10 February 2005. Archived from the original on 4 March 2014. Retrieved 11 May 2010.
  217. ^ "Boy, 3, Sleeps for First Time After Experimental Surgery". FoxNews.com. 16 May 2008. Archived from the original on 5 October 2016.
  218. ^ Canning A (23 January 2009). "Mystery of Sleepless Boy Solved: Boy Who Couldn't Sleep Undergoes Risky, Life-Changing Operation". ABC News.
  219. ^ Fischer-Perroudon C, Mouret J, Jouvet M (January 1974). "One case of agrypnia (4 months without sleep) in a morvan disease. Favourable action of 5-hydroxytryptophane". Electroencephalography and Clinical Neurophysiology. 36 (1): 1–18. doi:10.1016/0013-4694(74)90132-1. PMID 4128428.