Ischioanal fossa

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Ischioanal fossa
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The perineum. The integument and superficial layer of superficial fascia reflected. (Ischiorectal fossa labeled at bottom left.)
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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
Dorlands/Elsevier f_14/12376209

The ischiorectal fossa (or ischioanal 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.

Boundaries

It has the following boundaries:[1]

ANTERIOR
* fascia of Colles covering the Transversus perinei superficialis
* inferior fascia of the urogenital diaphragm
LATERAL
* tuberosity of the ischium
* Obturator internus muscle
* obturator fascia
SUPERIOR:
* Levator ani

INFERIOR:
* skin
MEDIAL:
* Levator ani
* Sphincter ani externus
* anal fascia
POSTERIOR
* Gluteus maximus
* sacrotuberous ligament

Contents

The contents include:

References

  1. analtrianglesection - Ischiorectal fossa is colored yellow

See also

Additional images

External links


This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


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