Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine

SPINAL NERVE ROOTS

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