Preganglionic fibers

Preganglionic fibers

Infobox Nerve
Name = PAGENAME
Latin = neurofibrae postganglionicae
GraySubject =
GrayPage =


Caption = Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively


Caption2 =
Innervates =
BranchFrom =
BranchTo =
MeshName =
MeshNumber =
DorlandsPre = n_06
DorlandsSuf = 12568789
In the autonomic nervous system, fibers from the CNS to the ganglion are known as preganglionic 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).

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.

ee also

* Postganglionic fibers

External links

* [http://medic.med.uth.tmc.edu/Lecture/labeled/scheme.gifDiagram at tmc.edu]
* [http://medweb.bham.ac.uk/research/toescu/Teaching/GIT/PSInnerv.htm Diagram at bham.ac.uk]
* [http://www.arts.uwaterloo.ca/~bfleming/psych261/image29.gifDiagram at uwaterloo.ca]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • preganglionic fibers — preganglionic nerve fibers neurofibrae preganglionicae …   Medical dictionary

  • preganglionic — [prē gaŋ΄glē än′ik] adj. Zool. of or pertaining to nerve fibers going from the spinal cord to sympathetic ganglia …   English World dictionary

  • preganglionic — Situated proximal to or preceding a ganglion; referring specifically to the p. motor neurons of the autonomic nervous system (located in the spinal cord and brainstem) and the p., myelinated nerve fibers by which they are connected to the… …   Medical dictionary

  • preganglionic neurons — neurons in the autonomic nervous system whose cell bodies lie in the central nervous system and whose efferent fibers terminate in the autonomic ganglia. See also pars parasympathica divisionis autonomici systematis nervosi, under pars …   Medical dictionary

  • General visceral efferent fibers — Infobox Anatomy Name = PAGENAME Latin = GraySubject = 190 GrayPage = 849 Caption = Scheme showing structure of a typical spinal nerve. 1. Somatic efferent. 2. Somatic afferent. 3,4,5. Sympathetic efferent. 6,7. Sympathetic afferent. Caption2 =… …   Wikipedia

  • Postganglionic fibers — Infobox Nerve Name = PAGENAME Latin = neurofibrae postganglionicae GraySubject = GrayPage = Caption = Sympathetic connections of the ciliary and superior cervical ganglia. Caption2 = Innervates = BranchFrom = BranchTo = MeshName = MeshNumber =… …   Wikipedia

  • Projection fibers — Brain: Projection fibers Latin Fibrae projectionis Gray s subject #189 843 NeuroNames ancil 219 Code TA A14.1.00.018 …   Wikipedia

  • General somatic efferent fibers — Scheme showing structure of a typical spinal nerve. 1. Somatic efferent. 2. Somatic afferent. 3,4,5. Sympathetic efferent. 6,7. Sympathetic afferent. Gray s …   Wikipedia

  • B fibers — myelinated preganglionic autonomic axons having a fiber diameter ≤3 μm and a conduction velocity of 3 to 15 meters per second; these include only efferent fibers …   Medical dictionary

  • Parasympathetic nervous system — The parasympathetic nervous system (PSNS) is a division of the autonomic nervous system (ANS), along with the sympathetic nervous system (SNS) and enteric nervous system (ENS or bowels NS ). The ANS is a subdivision of the peripheral nervous… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”