- Pudendal nerve
Name = Pudendal nerve
Latin = nervus pudendus
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GrayPage = 967
Caption = Pudendal nerve, course and branches
Sacral plexusof the right side. (Inferior pudendal labeled at bottom right.)
sacral nerves S2-S4
inferior rectal nerves perineal nerve dorsal nerve of the penis
DorlandsPre = n_05
DorlandsSuf = 12566568
The pudendal nerve is a
nervein 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 ramiof the second, third, and fourth sacral nerves (S2, S3, S4).
It passes between the
piriformisand coccygeusmuscles and leaves the pelvis through the lower part of the greater sciatic foramen.
It crosses the spine of the
ischium, and reenters the pelvisthrough 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 fasciatermed 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
penisand 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 ejaculationin the male and most of the feelings of orgasmin both sexes.
childbirthor 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.
* - "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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