|Nerve: Pudendal nerve|
|Dissection of side wall of pelvis showing sacral and pudendal plexuses. (Pudendal nerve labeled at center right.)|
|Sacral plexus of the right side. (Inferior pudendal labeled at bottom right.)|
|Gray's||subject #213 967|
|From||sacral nerves S2-S4|
|To||inferior rectal nerves|
dorsal nerve of the penis
The pudendal nerve originates in the sacral plexus; it derives its fibers from the ventral branches of the second, third, and fourth sacral nerves (S2, S3, S4).
The pudendal nerve gives off the inferior rectal nerves. It soon divides into two terminal branches: the perineal nerve, and the dorsal nerve of the penis (males) or the dorsal nerve of the clitoris (in females).
|Inferior anal nerves||given off shortly after passing through the Greater sciatic foramen.|
|Perineal nerve||more superficial terminal branch|
|Dorsal nerve of penis/Dorsal nerve of clitoris||deeper terminal branch, traveling into the deep perineal pouch|
The pudendal nerve innervates the penis and clitoris, bulbospongiosus and ischiocavernosus muscles, and areas around the scrotum, perineum, and anus. At sexual climax, the spasms in the bulbospongiosus and ischiocavernous results in ejaculation in the male and most of the feelings of orgasm in both sexes.
Difficult childbirth or bicycling can compress or stretch the pudendal nerve, causing temporary loss of function, but permanent injury is rare. Entrapment of the nerve is very rare but can happen. A pelvic tumor (most notably a large sacrococcygeal teratoma), or surgery to remove the tumor, can damage this nerve permanently.
- SUNY Figs 41:04-11 - "Inferior view of female perineum, branches of the internal pudendal artery."
- Human anatomy at Dartmouth figures/chapter_32/32-2.HTM
- Human anatomy at Dartmouth figures/chapter_32/32-3.HTM
- Cross section at UV pelvis/pelvis-female-17
- Pudendal nerve entrapment at chronicprostatitis.com