ischiocavernosus muscle
{{Short description|Sheet of fibrous tissue between the thigh and the front of the perineum}}
{{Infobox muscle
| Name = Ischiocavernosus muscle
| Latin = musculus ischiocavernosus
| Image = Ischiocavernosus-male.png
| Caption = Muscles of male perineum (ischiocavernosus visible at upper left)
| Image2 = Ischiocavernosus-female.png
| Caption2 = Muscles of the female perineum (ischiocavernosus visible at upper right)
| Origin = Ischial tuberosity
| Insertion = Crus of penis (male) or crus of clitoris (female)
| Blood = Perineal artery
| Nerve = Pudendal nerve
| Action = Maintains penile erection (male) or clitoral erection (female)
}}
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.{{cite book |editor1-last=Shaw|editor1-first=Robert| last1 = Maclean | first1= Allan|last2=Reid|first2=Wendy | title = Gynaecology | chapter=40|publisher = Churchill Livingstone/Elsevier | location = Edinburgh New York | year = 2011 | isbn = 978-0-7020-3120-5 |pages= 599–612|postscript=; Access provided by the University of Pittsburgh}}
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
In females, the ischiocavernosus muscle assists with clitoral erection.{{cite book |last1=Dean O'Loughlin |first1=Valerie |last2=Stouter Bidle |first2=Theresa |last3=McKinley |first3=Michael P. |title=Anatomy and Physiology: An Integrative Approach |date=2022 |publisher=McGraw Hill |isbn=9781264265411 |page=395 |edition=Fourth |chapter=Muscular System: Axial and Appendicular Muscles}} 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
File:Gray236.png|Right hip bone. Internal surface.
File:Gray407.png|Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front.
File:Gray542.png|The superficial branches of the internal pudendal artery.
References
{{Gray's}}
{{Reflist}}
External links
- {{SUNYAnatomyLabs|41|11|01|01}} - "The Female Perineum: Muscles of the Superficial Perineal Pouch"
- {{SUNYAnatomyFigs|41|05|01}} - "Muscles of the female superficial perineal pouch."
- {{SUNYAnatomyFigs|42|04|01}} - "Muscles of the male superficial perineal pouch. "
{{Muscles of perineum}}
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