Preganglionic nerve fibers: Difference between revisions

Preganglionic nerve fibers
Preganglionic nerve fibers
	Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively
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Identifiers
Latin	neurofibrae preganglionicae
TA98	A14.2.00.009
FMA	76568
	Anatomical terms of neuroanatomy [edit on Wikidata]

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In the autonomic nervous system, nerve fibers from the central nervous system to the ganglion are known as preganglionic nerve fibers. All preganglionic fibers, whether they are in the sympathetic division or in the parasympathetic division, are cholinergic (that is, these fibers use acetylcholine as their neurotransmitter) and they are myelinated.

Sympathetic preganglionic fibers tend to be shorter than parasympathetic preganglionic fibers because sympathetic ganglia are often closer to the spinal cord than are the parasympathetic ganglia. Another major difference between the two ANS (autonomic nervous systems) is divergence. Whereas in the parasympathetic division there is a divergence factor of roughly 1:4, in the sympathetic division there can be a divergence of up to 1:20. This is due to the number of synapses formed by the preganglionic fibers with ganglionic neurons.

References

External links

Diagram at uwaterloo.ca

This neuroanatomy article is a stub. You can help Wikipedia by expanding it.

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+{{Short description|Nerve fibers connecting the central nervous system to a ganglion}}
-{{Infobox Nerve |
+{{more citations needed|date=November 2014}}
-  Name         = Preganglionic fibers |
+{{Infobox nerve
-  Latin        = neurofibrae preganglionicae |
+| Name        = Preganglionic nerve fibers
-  GraySubject  = 185 |
+| Latin       = neurofibrae preganglionicae
-  GrayPage     = 758 |
-  Image        = Gray839.png |
+| Image       = Gray839.png
-  Caption      = Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively |
+| Caption     = Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively
-  Image2       = |
+| Image2      =
-  Caption2     = |
+| Caption2    =
-  Innervates   = |
+| Innervates  =
-  BranchFrom   = |
+| BranchFrom  =
-  BranchTo     = |
+| BranchTo    =
-  MeshName     = |
-  MeshNumber   = |
-  DorlandsPre  = n_06 |
-  DorlandsSuf  = 12568789  |
 }}
-In the [[autonomic nervous system]], fibers from the [[central nervous system|CNS]] to the [[autonomic ganglion|ganglion]] are known as '''preganglionic fibers'''.
+In the [[autonomic nervous system]], [[nerve fiber]]s from the [[central nervous system]] to the [[autonomic ganglion|ganglion]] are known as '''preganglionic nerve fibers'''. All preganglionic fibers, whether they are in the [[sympathetic nervous system|sympathetic division]] or in the [[parasympathetic nervous system|parasympathetic division]], are  [[cholinergic]] (that is, these fibers use [[acetylcholine]] as their [[neurotransmitter]]) and they are [[myelin]]ated.
+[[Sympathetic nervous system|Sympathetic]] preganglionic fibers tend to be shorter than parasympathetic preganglionic fibers because sympathetic ganglia are often closer to the spinal cord than are the [[Parasympathetic nervous system|parasympathetic]] ganglia.  Another major difference between the two ANS (autonomic nervous systems) is divergence.  Whereas in the parasympathetic division there is a divergence factor of roughly 1:4, in the sympathetic division there can be a divergence of up to 1:20.  This is due to the number of synapses formed by the preganglionic fibers with ganglionic neurons.
-All preganglionic fibers, whether they are in the [[sympathetic nervous system|sympathetic division]] or in the [[parasympathetic nervous system|parasympathetic division]], are both  [[cholinergic]] (that is, these fibers use [[acetylcholine]] as their [[neurotransmitter]]) and either unmyelinated or [[myelin]]ated.
-[[Sympathetic nervous system|Sympathetic]] preganglionic fibers tend to be shorter than parasympathetic preganglionic fibers because sympathetic ganglia are often closer to the spinal cord than are the [[Parasympathetic nervous system|parasympathetic]] ganglia.  Another major difference between the two ANS systems is divergence.  Whereas in the parasympathetic division there is roughly a divergence factor of roughly 1:4, in the sympathetic division there can be a divergence of up to 1:20.  This is due to the number of synapses formed by the preganglionic fibers with ganglionic neurons.
 ==See also==
-* [[Postganglionic fibers]]
 * [[Nerve fiber]]
+* [[Grey column]]
+* [[Terminal cisterna]]
+* [[Rexed lamina]]
+* [[Postganglionic nerve fiber]]
+* [[Splanchnic nerve]]
+* [[Lateral grey column]]
+==References==
+{{Reflist}}
 ==External links==
-* [http://www.arts.uwaterloo.ca/~bfleming/psych261/image29.gif Diagram at uwaterloo.ca]
+* [https://web.archive.org/web/20070228115633/http://www.arts.uwaterloo.ca/~bfleming/psych261/image29.gif Diagram at uwaterloo.ca]
 {{Nervous tissue}}
+{{Authority control}}
 [[Category:Autonomic nervous system]]
-{{Neuroscience-stub}}
+{{Neuroanatomy-stub}}
-[[es:Fibras preganglionares]]
-[[eu:Zuntz aurregongoildar]]
-[[ps:پريګانګليونېک عصبي ريښې]]