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Superficial Transverse Perineal Muscle
Muscular System

Superficial Transverse Perineal Muscle

Musculus transversus superficialis perinei

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Quick Facts

Origin: Ischial tuberosity; ramus of ischium.

Insertion: Perineal body.

Action: Stabilizes perineal body; provides structural support to adjacent pelvic and perineal structures.

Innervation: Perineal nerve (S2-S4).

Arterial Supply: Perineal artery.

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Origin

The superficial transverse perineal muscle originates from the:

- ischial tuberosity;

- ramus of ischium.

Insertion

The fibers of the superficial transverse perineal muscle travel medially and insert onto the perineal body.

Key Features & Anatomical Relations

The superficial transverse perineal muscle is one of the muscles of the superficial perineal space, which itself is found in the urogenital triangle of the perineum. It is a short, thin skeletal muscle.

It is located:

- inferior to the perineal membrane and the deep transverse perineal muscle;

- medial to the ischium;

- lateral to the perineal body.

Actions

The superficial transverse perineal muscle stabilizes the perineal body and provides structural support to adjacent pelvic and perineal structures (Moore, Dalley and Agur, 2009).

References

Moore, K. L., Dalley, A. F. and Agur, A. M. R. (2009) Clinically Oriented Anatomy. Lippincott Williams & Wilkins.

Actions

The superficial transverse perineal muscle stabilizes the perineal body and provides structural support to adjacent pelvic and perineal structures (Moore, Dalley and Agur, 2009).

Learn more about this topic from other Elsevier products

Perineum

ScienceDirect image

The diamond-shaped perineum has the urogenital diaphragm (the triangular layer from the symphysis pubis in the front and then left and right ischial tuberosities, the two bony lumps on which we sit) as its roof and the skin as its floor.

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