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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 |
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.
Contents |
Boundaries
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: * skin |
MEDIAL: * Levator ani * Sphincter ani externus * anal fascia |
| POSTERIOR * Gluteus maximus * sacrotuberous ligament |
Contents
The contents include:
- Inside Alcock's canal, on the lateral wall
- Outside Alcock's canal, crossing the space transversely
- inferior rectal artery
- inferior rectal veins
- inferior anal nerves
- fatty tissue across which numerous fibrous bands extend from side to side
References
- ^ analtrianglesection - Ischiorectal fossa is colored yellow
See also
Additional images
 Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front. |
 The superficial branches of the internal pudendal artery. |
External links
- SUNY Cross Section apmalefrontal4-8
- SUNY Labs 41:04-0103 - "The Female Perineum: The Ischioanal Fossa"
- SUNY Anatomy Image 9246
- Cross section at UV pelvis/pelvis-e12-15
- Norman/Georgetown perineum (analtriangle2, femaleugtrianglesectionfascia)
- Diagram at Emory University
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- This page was last modified on 18 September 2008, at 18:43.
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