Anatomy study note · Perineum

Superficial transverse perineal muscle

A small muscle in the back of the superficial perineal pouch that steadies the perineal body.

Key points

• Ischial tuberosity → perineal body.
• Perineal branch of the pudendal nerve.
• Steadies the perineal body.
• Striated muscle: myotomes + local mesenchyme.
• Nerve supply indicates origin.
• Skeletal muscle: multinucleated, peripheral nuclei, striated.
• Epimysium → perimysium → endomysium.

The full note in the atlas also covers

Features · Origin · Insertion · Action · Nerve supply · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 10, PDF pp. 1174–1175, 1204–1205
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 92, 108–109
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the perineum

• Dorsal vessels of the penis
• External anal sphincter
• Male urethra
• Penis
• Pudendal nerve

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