Ischioanal fossa | |
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Details | |
Identifiers | |
Latin | fossa ischioanalis |
TA98 | A09.5.04.001 |
TA2 | 2446 |
FMA | 22059 |
Anatomical terminology |
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.
It has the following boundaries: [1]
ANTERIOR * fascia of Colles covering the transversus perinei superficialis * inferior fascia of the urogenital diaphragm (perineal membrane) |
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LATERAL * tuberosity of the ischium * Obturator internus muscle * obturator fascia |
SUPERIOR: * Levator ani INFERIOR: |
MEDIAL: * Levator ani * Sphincter ani externus muscle * anal fascia |
POSTERIOR * Gluteus maximus * sacrotuberous ligament |
The contents include:
This article incorporates text in the public domain from page 425 of the 20th edition of Gray's Anatomy (1918)