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Anterior Root of Fifth Sacral Nerve (Left)
Nervous System

Anterior Root of Fifth Sacral Nerve (Left)

Radix anterior nervi sacralis quinti

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Quick Facts

Origin: Surface of the spinal cord ventral to the ventral horn.

Course: Inferiorly towards the apex of the sacrum.

Branches: No branches.

Supply: Potential innervation of coccygeus muscle.

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Origin

The anterior root of the fifth sacral nerve originates as a series of rootlets that emerge from the ventrolateral surface of the spinal cord. These quickly merge to form the anterior root.

Course

The anterior root runs inferiorly. At lumbar and sacral levels, the anterior root descends through the vertebral column until it reaches the apex of the sacrum. Just before entering the sacral hiatus the anterior and posterior roots merge to form the spinal nerve.

Branches

There are no named branches.

Supplied Structures

The anterior root of the fifth sacral nerve has limited function. It may innervate the coccygeus muscle. Otherwise, the fifth sacral nerve is sensory.

Learn more about this topic from other Elsevier products

Sacral Nerves

ScienceDirect image

The sacral nerves are a set of five spinal nerves that project to the pelvic floor, carrying afferent and efferent fibers for communication between pelvic organs and the central nervous system (CNS).

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