Ischiocavernosus muscle
| Ischiocavernosus muscle | |
|---|---|
 Muscles of male perineum (ischiocavernosus visible at upper left) | |
 Muscles of the female perineum (ischiocavernosus visible at upper right) | |
| Details | |
| Origin | Ischial tuberosity |
| Insertion | Crus of penis (male) or crus of clitoris (female) |
| Artery | Perineal artery |
| Nerve | Pudendal nerve |
| Actions | Maintains penile erection (male) or clitoral erection (female) |
| Identifiers | |
| Latin | musculus ischiocavernosus |
| TA98 | A09.5.02.004 |
| TA2 | 2417 |
| FMA | 19730 |
| 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
[edit]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
[edit]In females, the ischiocavernosus muscle assists with clitoral erection.[2] In males, it helps to stabilize the erect penis by compressing the crus penis and retarding the return of blood through the veins.
Additional images
[edit]-
Right hip bone. Internal surface. -
Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front. -
The superficial branches of the internal pudendal artery.
References
[edit]
This article incorporates text in the public domain from page 428 of the 20th edition of Gray's Anatomy (1918)
- ^ 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) - ^ Dean O'Loughlin, Valerie; Stouter Bidle, Theresa; McKinley, Michael P. (2022). "Muscular System: Axial and Appendicular Muscles". Anatomy and Physiology: An Integrative Approach (Fourth ed.). McGraw Hill. p. 395. ISBN 9781264265411.
External links
[edit]- 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. "
| Perineum |
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| Fascia |
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