Dorsal roots

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Dorsal roots
The formation of the spinal nerve from the dorsal and ventral roots
Latin	radix posterior
Gray's	subject #208 916
System
MeSH	A08.800.800.720.725
[[Image:|190px|center|]]

In anatomy and neurology, the dorsal root (or posterior root) is the afferent 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.

[edit] Additional images

Cervical vertebra	Medulla spinalis	The mechanism of the reflex arc	A spinal nerve with its anterior and posterior roots.
The sensory tract.	Diagrammatic transverse section of the medulla spinalis and its membranes.	A portion of the spinal cord, showing its right lateral surface. The dura is opened and arranged to show the nerve roots.	Scheme showing structure of a typical spinal nerve.

[edit] See also

• Dorsal horns
• Ventral root

[edit] External links

• SUNY Figs 02:04-06 - "Superior view of a section through the spinal cord within the vertebral foramen."
• Anatomy Atlases - Microscopic Anatomy, plate 06.114 - "Spinal Root Nerve Fibers"

Spinal cord

epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater, denticulate ligaments, conus medullaris, cauda equina, filum terminale, cervical enlargement, lumbar enlargement, anterior median fissure, dorsal root, dorsal root ganglion, dorsal ramus, ventral root, ventral ramus, sympathetic trunk, gray ramus communicans, white ramus communicans grey matter: central canal, substantia gelatinosa of Rolando, reticular formation, substantia gelatinosa centralis, interneuron, anterior horn, lateral horn, posterior horn (column of Clarke, dorsal spinocerebellar tract) white matter: anterior funiculus: descending (anterior corticospinal tract, vestibulospinal fasciculus, tectospinal tract), ascending (anterior spinothalamic tract, anterior proper fasciculus) lateral funiculus: descending (lateral corticospinal tract, rubrospinal tract, olivospinal tract), ascending dorsal spinocerebellar tract, ventral spinocerebellar tract, spinothalamic tract, lateral spinothalamic tract, anterior spinothalamic tract, spinotectal tract, posterolateral tract, lateral proper fasciculus, medial longitudinal fasciculus posterior funiculus: fasciculus gracilis, fasciculus cuneatus, posterior proper fasciculus

This page uses content from the English-language version of Wikipedia. The original article was at Dorsal root. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.