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Coccygeal Spinal Roots & Ganglion (Left)
Nervous System

Coccygeal Spinal Roots & Ganglion (Left)

Radicis et ganglia spinalia coccygeus

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Description

One of the thirty-one pairs of spinal nerves emerges from the coccygeal region. These pair of nerves are termed the coccygeal nerves.

The coccygeal nerves are mixed nerves, as each nerve is formed by the union of a posterior (sensory nerve fibers) and anterior root (motor nerve fibers). Located at the proximal end of each posterior root is a spinal ganglion. Ganglia contain the cell bodies of sensory nerve fibers. The coccygeal nerves terminate by dividing into anterior and posterior rami.

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Spinal Nerve

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Each spinal nerve supplies an embryologically defined somite or body segment, which is characterized by a dermatome, myotome, and sclerotome.

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