pudendal nerve


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pu·den·dal nerve

[TA]
branch of the sacral plexus formed by fibers from the ventral primary rami of the second, third, and fourth sacral spinal nerves; it exits the pelvis via the greater sciatic foramen, passes posterior to the sacrospinous ligament, and accompanies the internal pudendal artery, into the perineum via the lesser sciatic foramen; it gives off inferior rectal nerves, then courses through the pudendal canal in the lateral wall of the ischiorectal fossa, terminating as the dorsal nerve of the penis or of the clitoris.

pudendal nerve

one of the branches of the pudendal plexus that arises from the second, third, and fourth sacral nerves; passes between the piriformis and coccygeus; and leaves the pelvis through the greater sciatic foramen. It divides into five branches supplying the external genital structures and the pelvic region. The branches of the pudendal nerve are the inferior rectal nerve, perineal nerve, and dorsal nerve of the penis or of the clitoris. See also pudendal plexus.

pu·den·dal nerve

(pyū-den'dăl nĕrv) [TA]
Formed by fibers from the ventral primary rami of the second, third, and fourth sacral spinal nerves; it exits the pelvis through the greater sciatic foramen, passes posterior to the sacrospinous ligament, and accompanies the internal pudendal artery into the perineum through the lesser sciatic foramen; it gives off inferior rectal nerves, then courses through the pudendal canal in the lateral wall of the ischiorectal fossa, terminating as the dorsal nerve of the penis or of the clitoris.
Synonym(s): nervus pudendus [TA] .

pudendal nerve

A mixed nerve composed of axons from spinal nerves S2–S4. It follows the sciatic nerve out of the pelvis but immediately reenters through the lesser sciatic foramen. It innervates most of the structures of the perineum: it is sensory to the genitals and motor to the perineal muscles, the external urethral sphincter, and the external anal sphincter.
See also: nerve
References in periodicals archive ?
A working diagnosis of pudendal nerve entrapment was reached.
Pudendal nerve palsy after femoral intramedullary nailing.
External sphincter motor neurons originate from Onuf's nucleus, located on the anterior horns of the sacral spinal cord at levels S2-S4, and send their axons into the pudendal nerve (and to a lesser degree, the pelvic nerve) that stimulate the striated muscle to contract via the release of acetylcholine (Darrah, Griebling, & Silverstein, 2009; deGroat, 2006).
The usual clinical findings are inability to stand on one leg, aggravation of pain around pubic symphysis, which is supplied by genitofemoral (L1-2) and pudendal nerves (S2-4) with lifting of heavy objects and on walking.
In addition, current spread with direct bladder stimulation can stimulate the pudendal nerve to cause urethral closure [7-8].
Neuropathy of the pudendal nerve may result from forceps delivery or persistent nerve compression from the fetal head.
Neural engineer Warren Grill and biomedical engineering doctoral candidate Joseph Boggs found that applying small electrical currents to the pudendal nerve triggered coordinated contraction of the bladder and relaxation of the urethral sphincter, which controls the bladder's outlet.
For many women, orgasm is intense and relatively easy to reach with digital or oral contact because this is the most direct way to stimulate the large pudendal nerve which runs straight down into the tip of the clitoris (the glans.
Research first reported in 2005 by Kathleen Connell, MD, Marsha Guess, MD et al, in the American Journal of Obstetrics and Gynecology (ACOG) Evaluation of the role of pudendal nerve integrity in female sexual function using noninvasive techniques practically confirmed to us that decreased clitoral sensation is the single common theme in women's sexual difficulties and should remain our focus", said Martin Crosby, Chairman and Chief Scientific Officer for Zestra Laboratories, Inc.
But it should be suspected in women who have burning pain in any area along the distribution of the pudendal nerve.