Spinal nerve roots
(Dorsal Roots; Spinal Roots; Ventral Roots)

The paired bundles of nerve fibers entering and leaving the spinal cord at each segment. The dorsal and ventral nerve roots join to form the mixed segmental spinal nerves. The dorsal roots are generally afferent, formed by the central projections of the spinal (dorsal root) ganglia sensory cells, and the ventral roots efferent, comprising the axons of spinal motor and autonomic preganglionic neurons. There are, however, some exceptions to this afferent/efferent rule.


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of the <b>spinal nerve roots</b>
of the spinal nerve roots

<b>Spinal nerves</b> contain both
Spinal nerves contain both

of a typical <b>spinal nerve</b>.
of a typical spinal nerve.

Central <b>Nervous</b> System-<b>Spinal</b>
Central Nervous System-Spinal

The individual <b>spinal nerve</b>
The individual spinal nerve

<b>Nerve roots</b> are the fiber
Nerve roots are the fiber

The <b>nerve roots</b> exit at their
The nerve roots exit at their

<b>cervical spine nerve roots</b>
cervical spine nerve roots

Diagnosis and therapies



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Spinal nerve rootSpinal nerve rootsSacral anterior root stimulatorAnterior root of spinal nerveHeinrich LissauerRobert LissauerErnst LissauerLissauerAnterior funiculusCervical nerves

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Last update: April 2009