| Ischioanal fossa | |
|---|---|
| The perineum. The integument and superficial layer of superficial fascia reflected. (Ischiorectal fossa labeled at bottom left.) | |
| The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. (Ischiorectal fossa labeled at bottom right.) | |
| Latin | fossa ischioanalis |
| Gray's | subject #120 425 |
The ischioanal fossa (formerly called ischiorectal fossa) 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.
Contents |
It has the following boundaries:[1]
| ANTERIOR * fascia of Colles covering the Transversus perinei superficialis * inferior fascia of the urogenital diaphragm |
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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 was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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