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Dorsal root
From Wikipedia, the free encyclopedia
| Dorsal root | |
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| The formation of the spinal nerve from the dorsal and ventral roots | |
| Latin | radix posterior |
| Gray's | subject #208 916 |
| MeSH | Dorsal+Roots |
| Dorlands/Elsevier | r_12/12709389 |
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.
 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. |
- 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"
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This neuroscience article is a stub. You can help Wikipedia by expanding it. |
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| Spinal nerve | Dorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White) |
| Gray matter/Rexed laminae | Posterior horn (Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius) • Lateral horn • Anterior horn • Central canal/Substantia gelatinosa centralis |
| White matter: somatic/ascending (blue) | |
| White matter: motor/descending (red) |
Lateral: Corticospinal (Lateral) • Ep (Rubrospinal, Olivospinal) Anterior: Corticospinal (Anterior) • Ep (Vestibulospinal, Tectospinal, Reticulospinal) |
| Layers | Epidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater |
| Other structures | Denticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement • Anterior median fissure |