Pudendal nerve

Pudendal nerve

Infobox Nerve
Name = Pudendal nerve
Latin = nervus pudendus
GraySubject = 213
GrayPage = 967

Caption = Pudendal nerve, course and branches

Caption2 = Sacral plexus of the right side. (Inferior pudendal labeled at bottom right.)
Innervates =
BranchFrom = sacral nerves S2-S4
BranchTo = inferior rectal nerves
perineal nerve
dorsal nerve of the penis
DorlandsPre = n_05
DorlandsSuf = 12566568
The pudendal nerve is a nerve in the pelvic region that innervates the external genitalia of both sexes, as well as sphincters for the bladder and the rectum.


The pudendal nerve originates in the sacral plexus; it derives its fibers from the ventral rami of the second, third, and fourth sacral nerves (S2, S3, S4).

It passes between the piriformis and coccygeus muscles and leaves the pelvis through the lower part of the greater sciatic foramen.

It crosses the spine of the ischium, and reenters the pelvis through the lesser sciatic foramen.

It accompanies the internal pudendal vessels upward and forward along the lateral wall of the ischiorectal fossa, being contained in a sheath of the obturator fascia termed the pudendal canal.

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).


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 [cite journal |author=Mellion MB |title=Common cycling injuries. Management and prevention |journal=Sports Med |volume=11 |issue=1 |pages=52–70 |year=1991 |month=Jan |pmid=2011683 |doi= |url=] 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.


ee also

Neurogenic bladder


External links

* - "Inferior view of female perineum, branches of the internal pudendal artery."
* [http://www.pudendalhelp.com Diagnosis and treatment options, lists of doctors and physical therapists.]
* [http://www.nervemed.com/nerve-pudendal.html Diagnosis and treatment at www.nervemed.com]
* [http://www.pudendal.com www.pudendal.com]
* [http://www.chronicprostatitis.com/pne.html Pudendal nerve entrapment at chronicprostatitis.com]

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Look at other dictionaries:

  • pudendal nerve — n a nerve that arises from the second, third, and fourth sacral nerves and that supplies the external genitalia, the skin of the perineum, and the anal sphincters * * * the nerve that supplies the lowest muscles of the pelvic floor and the anal… …   Medical dictionary

  • Pudendal nerve entrapment — (PNE) is a source of chronic pain, in which the pudendal nerve (located in the pelvis) is entrapped or compressed. Pain is worsened by sitting, and can include prickling, stabbing, burning, numbness, and the sense of a foreign object in the… …   Wikipedia

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  • Pudendal canal — Infobox Anatomy Name = PAGENAME Latin = canalis pudendalis GraySubject = 119 GrayPage = 421 Caption = Coronal section of pelvis, showing arrangement of fasciæ. Viewed from behind. (Alcock s canal labeled at bottom right.) Caption2 = Pudendal… …   Wikipedia

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  • pudendal — Relating to the external genitals. SYN: pudic. * * * pu·den·dal pyu̇ den dəl adj of, relating to, occurring in, or lying in the region of the external genital organs pudendal n a pudendal anatomical part (as a vessel or the pudendal nerve) …   Medical dictionary

  • pudendal — adjective of or relating to or near the pudendum pudendal nerve • Pertains to noun: ↑pudendum • Derivationally related forms: ↑pudendum …   Useful english dictionary

  • Nerve to obturator internus — Nerve: Nerve to obturator internus Plan of sacral plexus and pudendal plexus. (Nerve to the Obturator internus and Gemellus superior labeled at lower left.) …   Wikipedia

  • Nerve to the Piriformis — Nerve: Nerve to the Piriformis Plan of sacral plexus and pudendal plexus. (Label to piriformis is at center left.) …   Wikipedia

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