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Nerve: Perineal nerve
Sacral plexus of the right side. (Perineal nerve visible at center right.)
Latin nervi perineales
Gray's subject #213 968
Innervates Transversus perinei superficialis
From pudendal nerve
MeSH [1]

The perineal nerve is a nerve arising from the pudendal nerve that supplies the perineum.


The perineal nerve is the inferior and larger of the two terminal branches of the pudendal nerve, is situated below the internal pudendal artery.

It accompanies the perineal artery and divides into two branches:

Branch Description
"Superficial", or "posterior scrotal" branches (called "labial" in women) See Posterior scrotal nerves for details.
"Deep", or "muscular" branches The muscular branches are distributed to the superficial transverse perineal muscle, bulbocavernous, ischiocavernosus, and Constrictor urethræ.

A branch, the nerve to the bulb, given off from the nerve to the bulbocavernosus, pierces this muscle, and supplies the corpus cavernosum, ending in the mucous membrane of the urethra.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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