Puborectalis

Written by Aren Mnatzakanian

Last updated January 19, 2023 • 4 Revisions •

The puborectalis is a muscle of the pelvic floor. It is part of the levator ani muscle group, and the most important for maintaining faecal continence.

  • Attachments: Originates from the posterior surface of the pubis. It forms a U-shaped sling around the anal canal, and attaches to the pubis on the contralateral side.
  • Actions: onic contraction bends the anal canal anteriorly. This creates the anorectal angle which contributes to faecal continence. It is voluntarily inhibited during defecation.
  • Innervation: Nerve to levator ani and pudendal nerve.
  • Blood supply: Inferior gluteal, inferior vesical and pudendal arteries.

Fig 1
Superior (bird’s eye) view of the pelvic floor. Note the prerectal fibres of the puborectalis.

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