SPHINCTER URETHRAE

 

Rotation


Perineal membrane and deep perineal pouch- Pelvic floor-  3D rotation

Gallery

 

ORIGIN:  Ischiopubic ramus

 

INSERTION:  Male: Median raphe in front and behind urethra; Female: encloses urethra and attaches to sides of vagina. It therefore acts as SPHINCTER VAGINAE(voluntary) as opposed to involuntary sphincter of vagina which is the female bulbospongiosus. It is also a distinct voluntary vaginal sphincter different from the pelvic floor (levator ani)and specifically part of the pubococcygeus known as the pubovaginalis- called puboprostaticus (levator prostatae) in males.

 

ACTION:  Voluntary external urethral sphincter/?vaginal orgasm

 

NERVE:  Perineal nerve

 

Action animation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIGITAL LOCATOR OF SPHINCTER URETHRAE: Layer 1 Layer of skin of female perineum. Layer 2 Layer of superficial fascia of female perineum. Layer 3 Layer of superficial muscles in superficial perineal pouch of female perineum. Layer 4 Layer of intermediate muscles in deep perineal pouch of female perineum. Layer 5 Layer of deep muscles in deep perineal pouch of female perineum. Rollover mouse to label, click to display page;click endpage to display sphincter urethrae page.ge. Sphincter urethrae at layer 5 of female perineum at deep perineal pouch

 

 

 

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