From Wikipedia, the free encyclopedia
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
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
[edit] External links
| Spinal cord
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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
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