Dorsal root
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2008-04-17T01:47:10Z
Shunju-kun
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{{Infobox Anatomy |
Name = {{PAGENAME}} |
Latin = radix posterior |
GraySubject = 208 |
GrayPage = 916 |
Image = spinal nerve.svg |
Caption = The formation of the spinal nerve from the dorsal and ventral roots |
Image2 = |
Caption2 = |
System = |
Precursor = |
MeshName = Dorsal+Roots |
MeshNumber = A08.800.800.720.725|
DorlandsPre = r_12 |
DorlandsSuf = 12709389 |
}}
In [[anatomy]] and [[neurology]], the '''dorsal root''' (or '''posterior root''') is the [[afferent nerve|afferent]]
[[somatosensory system|sensory]] root of a [[spinal nerve]].
At the distal end of the dorsal root is the [[dorsal root ganglion]], which contains the [[neuron]] cell bodies of the [[nerve]] fibres conveyed by the root.
If the dorsal root of a spinal nerve were severed it would lead to numbness in certain areas of the body.
==Additional images==
<gallery>
Image:Cervical vertebra english.png|Cervical vertebra
Image:Medulla spinalis - Section - English.svg|Medulla spinalis
Image:ReflexArc1.jpg|The mechanism of the reflex arc
Image:Gray675.png|A spinal nerve with its anterior and posterior roots.
Image:Gray759.png|The sensory tract.
Image:Gray770.png|Diagrammatic transverse section of the medulla spinalis and its membranes.
Image:Gray796.png|A portion of the spinal cord, showing its right lateral surface. The dura is opened and arranged to show the nerve roots.
Image:Gray799.svg|Scheme showing structure of a typical spinal nerve.
</gallery>
==See also==
* [[Ventral root]]
==External links==
* {{SUNYAnatomyFigs|02|04|06}} - "Superior view of a section through the spinal cord within the [[vertebral foramen]]."
* {{AnatomyAtlasesMicroscopic|06|114}} - "Spinal Root Nerve Fibers"
{{neuroscience-stub}}
{{Spinal cord}}
[[Category:Nervous system]]
[[category:back anatomy]]
[[ja:後根]]