Ischioanal fossa
4787180
172638237
2007-11-20T04:24:19Z
Arcadian
104523
moved [[Ischiorectal fossa]] to [[Ischioanal fossa]] over redirect: more modern name
{{Infobox Anatomy |
Name = {{PAGENAME}} |
Latin = fossa ischioanalis |
GraySubject = 120 |
GrayPage = 425 |
Image = Gray405.png |
Caption = The [[perineum]]. The integument and superficial layer of [[superficial fascia]] reflected. (Ischiorectal fossa labeled at bottom left.) |
Image2 = Gray1077.png |
Caption2 = The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. (Ischiorectal fossa labeled at bottom right.) |
System = |
MeshName = |
MeshNumber = |
DorlandsPre = f_14 |
DorlandsSuf = 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 fascia]]e.
==Boundaries==
It has the following boundaries:<ref>{{NormanAnatomyFig|analtrianglesection}} - Ischiorectal fossa is colored yellow</ref>
{| class="wikitable"
| || ANTERIOR<BR>* [[fascia of Colles]] covering the [[Transversus perinei superficialis]]<BR>* [[inferior fascia of the urogenital diaphragm]] ||
|-
| LATERAL<BR>* [[tuberosity of the ischium]]<BR>* [[Obturator internus muscle]] <BR>* [[obturator fascia]] || SUPERIOR:<BR>* [[Levator ani]]<BR><BR>INFERIOR:<BR>* [[skin]] || MEDIAL:<BR>* [[Levator ani]]<BR>* [[Sphincter ani externus]]<BR>* [[anal fascia]]
|-
| || POSTERIOR<BR>* [[Gluteus maximus]]<BR>* [[sacrotuberous ligament]] ||
|}
==Contents==
The contents include:
* Inside [[Alcock's canal]], on the lateral wall
** [[internal pudendal artery]]
** [[internal pudendal vein]]
** [[pudendal nerve]]
* 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==
<references/>
==See also==
* [[Anal triangle]]
==Additional images==
<gallery>
Image:Gray407.png|Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front.
Image:Gray542.png|The superficial branches of the internal pudendal artery.
</gallery>
==External links==
* {{SUNYCrossSection|apmalefrontal4-8}}
* {{SUNYAnatomyLabs|41|04|01|03}} - "The Female Perineum: The Ischioanal Fossa"
* {{SUNYAnatomyImage|9|2|46}}
* {{ViennaCrossSection|pelvis/pelvis-e12-15}}
* {{NormanAnatomy|perineum}} ({{NormanAnatomyFig|analtriangle2}}, {{NormanAnatomyFig|femaleugtrianglesectionfascia}})
* [http://www.emory.edu/ANATOMY/AnatomyManual/92.jpg Diagram] at [[Emory University]]
{{anatomy-stub}}
{{Gray's}}
{{Torso general}}
[[pt:Fossa isquioanal]]