Arcuate nucleus (medulla): Difference between revisions
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{{about|the structure in the medulla oblongata|the hypothalamic structure|Arcuate nucleus}} |
{{about|the structure in the medulla oblongata|the hypothalamic structure|Arcuate nucleus (hypothalamus)}} |
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{{Infobox brain |
{{Infobox brain |
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| Name = Arcuate nucleus (medulla) |
| Name = Arcuate nucleus (medulla) |
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In the [[medulla oblongata]], the '''arcuate nucleus''' is a group of [[neuron]]s located on the anterior surface of the [[medullary pyramids (brainstem) |
In the [[medulla oblongata]], the '''arcuate nucleus''' is a group of [[neuron]]s located on the anterior surface of the [[medullary pyramids (brainstem)|medullary pyramids]]. These nuclei are the extension of the [[pontine nuclei]].<ref name=":2242">{{Cite book |last=Standring |first=Susan |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's Anatomy: The Anatomical Basis of Clinical Practice |publisher=[[Elsevier]] |year=2020 |isbn=978-0-7020-7707-4 |edition=42th |location=New York |pages=445.e1 |oclc=1201341621}}</ref> |
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They receive afferents from the [[corticospinal tract]].{{Citation needed|date=July 2024}} |
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Arcuate nuclei are capable of [[chemoreceptor |chemosensitivity]] and have a proven role in the [[respiratory center]] controlling the [[respiratory rate |breathing rate]]. |
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They in turn project efferents into the [[cerebellum]] through the [[inferior cerebellar peduncle]] as:<ref name=":2242" /> |
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* the [[anterior internal arcuate fibers]] which pass along the midline before decussating near the [[Rhomboid fossa|rhomboid fossa (floor of fourth ventricle)]] then passing laterally as the [[Medullary striae of fourth ventricle|medullary striae]]; |
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* the [[anterior external arcuate fibers]]. |
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== Function == |
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Arcuate nuclei are capable of [[chemoreceptor|chemosensitivity]] and have a proven role in the [[respiratory center]] controlling the [[respiratory rate|breathing rate]].<ref name="Paradiso2018">{{cite journal |last1=Paradiso |first1=B |last2=Ferrero |first2=S |last3=Thiene |first3=G |last4=Lavezzi |first4=AM |title=Variability of the medullary arcuate nucleus in humans. |journal=Brain and Behavior |date=November 2018 |volume=8 |issue=11 |pages=e01133 |doi=10.1002/brb3.1133 |pmid=30329220|hdl=11577/3281424 |hdl-access=free }}</ref> |
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==Additional images== |
==Additional images== |
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* [https://www.ncbi.nlm.nih.gov/pubmed/17950558 PubMed article] |
* [https://www.ncbi.nlm.nih.gov/pubmed/17950558 PubMed article] |
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== References == |
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{{Rhombencephalon}} |
{{Reflist}}{{Rhombencephalon}} |
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{{Authority control}} |
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[[Category:Respiratory physiology]] |
[[Category:Respiratory physiology]] |
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Latest revision as of 01:07, 29 September 2024
| Arcuate nucleus (medulla) | |
|---|---|
 Transverse section of medulla oblongata below the middle of the olive. ("Nucleus arcuatus" visible near bottom right.) | |
 Dissection of brain-stem. Lateral view. (Labels for "External arcuate fibers" and "Dorsal external arcuate fibers" visible at lower right.) | |
| Details | |
| Identifiers | |
| Latin | nucleus arcuatus medullae oblongatae |
| NeuroNames | 775 |
| NeuroLex ID | birnlex_2635 |
| TA98 | A14.1.04.256 |
| TA2 | 6016 |
| FMA | 72609 |
| Anatomical terms of neuroanatomy | |
In the medulla oblongata, the arcuate nucleus is a group of neurons located on the anterior surface of the medullary pyramids. These nuclei are the extension of the pontine nuclei.[1]
They receive afferents from the corticospinal tract.[citation needed]
They in turn project efferents into the cerebellum through the inferior cerebellar peduncle as:[1]
- the anterior internal arcuate fibers which pass along the midline before decussating near the rhomboid fossa (floor of fourth ventricle) then passing laterally as the medullary striae;
- the anterior external arcuate fibers.
Function
[edit]Arcuate nuclei are capable of chemosensitivity and have a proven role in the respiratory center controlling the breathing rate.[2]
Additional images
[edit]-
Diagram showing the course of the arcuate fibers. -
The formatio reticularis of the medulla oblongata, shown by a transverse section passing through the middle of the olive.
External links
[edit]References
[edit]- ^ a b Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York: Elsevier. p. 445.e1. ISBN 978-0-7020-7707-4. OCLC 1201341621.
- ^ Paradiso, B; Ferrero, S; Thiene, G; Lavezzi, AM (November 2018). "Variability of the medullary arcuate nucleus in humans". Brain and Behavior. 8 (11): e01133. doi:10.1002/brb3.1133. hdl:11577/3281424. PMID 30329220.
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