Superficial transverse perineal muscle
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2008-01-19T23:45:26Z
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{{Infobox Muscle |
Name = {{PAGENAME}} |
Latin = musculus transversus perinei superficialis |
GraySubject = 120 |
GrayPage = 427 |
Image = Gray403.png |
Caption = Median sagittal section of pelvis, showing arrangement of fasciæ. (Transversus perinei superficialis visible at bottom right.) |
Image2 = Gray542.png |
Caption2 = The superficial branches of the internal pudendal artery. (Transversus perinei labeled at center left.) |
Origin = anterior part of [[ischial tuberosity]]|
Insertion = [[central point]] of [[perineum]]|
Blood = |
Nerve = [[pudendal nerve]] |
Action = |
MeshName = |
MeshNumber = |
DorlandsPre = m_22 |
DorlandsSuf = 12551265 |
}}
The '''Transversus perinei superficialis''' (Transversus perinei; Superficial transverse perineal muscle) is a narrow muscular slip, which passes more or less transversely across the [[perineal space]] in front of the [[anus]].
==Origin and insertion==
It arises by tendinous fibers from the inner and forepart of the tuberosity of the [[ischium]], and, running medialward, is inserted into the central tendinous point of the perineum, joining in this situation with the muscle of the opposite side, with the [[Sphincter ani externus]] behind, and with the [[Bulbocavernosus]] in front.
In some cases, the fibers of the deeper layer of the Sphincter ani externus [[decussate]] in front of the anus and are continued into this muscle. Occasionally it gives off fibers, which join with the Bulbocavernosus of the same side.
Variations are numerous. It may be absent or double, or insert into Bulbocavernosus or External sphincter.
==Additional images==
<gallery>
Image:Gray236.png|Right hip bone. Internal surface.
</gallery>
==External links==
* {{GPnotebook|-697630643}}
* {{MuscleLoyola|stp}}
* {{SUNYAnatomyLabs|41|11|01|03}} - "The Female Perineum: Muscles of the Superficial Perineal Pouch"
* {{SUNYAnatomyImage|9|1|48}}
* {{SUNYAnatomyImage|9|1|63}}
* {{SUNYAnatomyImage|9|1|72}}
{{Gray's}}
{{muscle-stub}}
{{Muscles_of_trunk}}
[[de:Musculus transversus perinei superficialis]]
[[es:Músculo transverso superficial del periné]]