Ischiocavernosus muscle

Ischiocavernosus muscle
Muscles of male perineum (ischiocavernosus visible at upper left)
Muscles of the female perineum (ischiocavernosus visible at upper right)
Details
OriginIschial tuberosity
InsertionCrus of penis (male) or Crus of clitoris (female)
ArteryPerineal artery
NervePudendal nerve
ActionsMaintains penile erection (male) or clitoral erection (female)
Identifiers
Latinmusculus ischiocavernosus
TA98A09.5.02.004
TA22417
FMA19730
Anatomical terms of muscle

The ischiocavernosus muscle (erectores penis or erector clitoridis in older texts) is a muscle just below the surface of the perineum, present in both men and women.[1]

Structure

It arises by tendinous and fleshy fibers from the inner surface of the tuberosity of the ischium, behind the crus penis; and from the inferior pubic rami and ischium on either side of the crus.

From these points fleshy fibers succeed, and end in an aponeurosis which is inserted into the sides and under surface of the crus penis.

Function

It helps (in males) stabilize the erect penis and (in females) tense the vagina during orgasm.

Ischiocavernosus compresses the crus penis (in males) or crus clitoris (in females), and retards the return of the blood through the veins, and thus serves to maintain the organ erect.

Additional images

References

Public domain This article incorporates text in the public domain from page 428 of the 20th edition of Gray's Anatomy (1918)

  1. ↑ Maclean, Allan; Reid, Wendy (2011). "40". In Shaw, Robert (ed.). Gynaecology. Edinburgh New York: Churchill Livingstone/Elsevier. pp. 599–612. ISBN 978-0-7020-3120-5; Access provided by the University of Pittsburgh{{cite book}}: CS1 maint: postscript (link)
  • Anatomy photo:41:11-0101 at the SUNY Downstate Medical Center - "The Female Perineum: Muscles of the Superficial Perineal Pouch"
  • Anatomy figure: 41:05-01 at Human Anatomy Online, SUNY Downstate Medical Center - "Muscles of the female superficial perineal pouch."
  • Anatomy figure: 42:04-01 at Human Anatomy Online, SUNY Downstate Medical Center - "Muscles of the male superficial perineal pouch. "
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