Transversus perinei superficialis muscle
| Transversus perinei superficialis muscle | ||
|---|---|---|
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| Median sagittal section of pelvis, showing arrangement of fasciæ. (Transversus perinei superficialis visible at bottom right.) | ||
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| The superficial branches of the internal pudendal artery. (Transversus perinei labeled at center left.) | ||
| Latin | musculus transversus perinei superficialis | |
| Gray's | subject #120 427 | |
| Origin: | anterior part of ischial tuberosity | |
| Insertion: | central point of perineum | |
| Artery: | ||
| Nerve: | pudendal nerve | |
| Action: | ||
| Dorlands/Elsevier | m_22/12551265 | |
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
 Right hip bone. Internal surface. |
External links
- -697630643 at GPnotebook
- Template:Gray's
- SUNY Labs 41:11-0103 - "The Female Perineum: Muscles of the Superficial Perineal Pouch"
- SUNY Anatomy Image 9148
- SUNY Anatomy Image 9163
- SUNY Anatomy Image 9172
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 As such, some of the information contained herein may be outdated.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.
| List of muscles of torso | |
|---|---|
| BACK | splenius
(capitis, cervicis) -
erector spinae (iliocostalis,
longissimus, spinalis) - latissimus dorsi transversospinales: (semispinalis dorsi, semispinalis cervicis, semispinalis capitis, multifidus, rotatores) - interspinales - intertransversarii |
| SUBOCCIPITAL | rectus capitis posterior (major, minor) - obliquus capitis (inferior, superior) |
| CHEST | intercostales (external, internal, innermost) - subcostales - transversus thoracis - levatores costarum - serratus posterior (inferior, superior) - diaphragm |
| ABDOMEN | obliques (external, internal) - transversus abdominis - rectus abdominis - pyramidalis - cremaster - quadratus lumborum |
| PELVIS | levator ani (iliococcygeus, pubococcygeus, puborectalis) - coccygeus |
| PERINEUM | sphincter ani (externus, internus)
superficial perineal pouch (transversus perinei superficialis, bulbospongiosus, ischiocavernosus) deep perineal pouch (transversus perinei profundus, sphincter urethrae membranaceae) |
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