Ischioanal fossa

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Ischioanal fossa
Gray405.png
The perineum. The integument and superficial layer of superficial fascia reflected. (Ischiorectal fossa labeled at bottom left.)
Gray1077.png
The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. (Ischiorectal fossa labeled at bottom right.)
Details
Identifiers
Latin fossa ischioanalis
Dorlands
/Elsevier
12376209
TA A09.5.04.001
FMA 22059
Anatomical terminology

The ischioanal fossa (formerly called ischiorectal fossa) is the fat-filled 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.

Boundaries[edit]

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 muscle
* anal fascia
POSTERIOR
* Gluteus maximus
* sacrotuberous ligament

Contents[edit]

The contents include:

See also[edit]

References[edit]

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. ^ analtrianglesection - Ischiorectal fossa is colored yellow

Additional images[edit]

External links[edit]