PERINEAL BRANCH OF S4

 

ORIGIN: From S4 nerve.

COURSE/DISTRIBUTION: This nerve is a branch of S4 nerve. It leaves S4 and passes through the coccygeus to reach the ischiorectal fossa. It supplies the skin between the anus and coccyx with sensory nerve and gives motor fibers to the deep part of external anal sphincter.

BRANCHES

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Muscular branches.

ROOT VALUE: S4.

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