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Elsevier
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Sacral Nerves
Nervous System

Sacral Nerves

Nervi sacrales

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Description

Five of the 31 pairs of spinal nerves emerge from the sacral spine. These five pairs of spinal nerves are known as the sacral nerves and are numbered the first to fifth sacral nerves.

The sacral nerves are mixed nerves, as each nerve is formed by the union of its posterior nerve root (sensory nerve fibers) with its anterior nerve root (motor nerve fibers). Located at the distal end of each posterior nerve root is a spinal ganglion. The ganglia contain the cell bodies of sensory nerve fibers. Each of the five sacral nerves terminates by dividing into anterior and posterior rami.

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