Spinal nerve root
System
Nervous
Spinal nerve root
Definition
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.
Also known as root of spinal nerve, spinal neural root, spinal root — per UBERON
The Spinal nerve root is a part of the Nervous.