Superficial transverse perineal muscle

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Superficial transverse perineal muscle
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Median sagittal section of male pelvis, showing arrangement of fasciæ. (Transversus perinei superficialis visible at bottom right.)
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The superficial branches of the internal pudendal artery in male pelvis. (Transversus perinei labeled at center left.)
Latin musculus transversus perinei superficialis
Gray's p.427
Origin anterior part of ischial tuberosity
Insertion Perineal body
Artery Internal pudendal artery
Nerve Perineal nerve
Actions Fixation of central tendon of perineum, support of pelvic floor[1]
Anatomical terms of muscle

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 anterior to the anus.

Origin and insertion[edit]

It arises by tendinous fibers from the inner and forepart of the tuberosity of the ischium, and, running medially, is inserted into the central tendinous point of the perineum (perineal body), joining in this situation with the muscle of the opposite side, with the Sphincter ani externus muscle behind, and with the Bulbospongiosus muscle 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[edit]

Notes[edit]

  1. ^ Saladin (2003), Muscles of the Pelvic Floor, p 354

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

  • Saladin, Kenneth S. (2003). Anatomy & Physiology: The Unity of Form and Function (3rd ed.). McGraw−Hill. 

External links[edit]