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Ischioanal fossa

Wedge-shaped space located lateral to the anal canal and inferior to the pelvic diaphragm From Wikipedia, the free encyclopedia

Ischioanal fossa
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The ischioanal fossa (formerly called ischiorectal fossa) is the fat-filled wedge-shaped space located lateral to the anal canal and inferior to the pelvic diaphragm. It is somewhat prismatic in shape, with its base directed to the surface of the perineum and its apex at the line of meeting of the obturator and anal fasciae.

Quick Facts Ischiorectal fossa, Details ...
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Boundaries

It has the following boundaries:[1]

ANTERIOR
* fascia of Colles covering the transversus perinei superficialis
* inferior fascia of the urogenital diaphragm (perineal membrane)
LATERAL
* tuberosity of the ischium
* Obturator internus muscle
* obturator fascia
SUPERIOR:
* Levator ani

INFERIOR:
* skin

MEDIAL:
* Levator ani
* Sphincter ani externus muscle
* anal fascia
POSTERIOR
* Gluteus maximus
* sacrotuberous ligament
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Contents

The contents include:

See also

References

Additional images

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