Written by Aren Mnatzakanian

Last updated January 2, 2023 • 6 Revisions •

The pyramidalis is a muscle of the anterior abdominal wall. It is a paired, triangular muscle, located superficial to the rectus abdominis.

  • Attachments: Originates from the pubic crest and pubic symphysis before inserting onto the linea alba.
  • Actions: Tenses the linea alba.
  • Innervation: Subcostal nerve (T12).
  • Blood supply: Inferior epigastric artery.

Fig 1
The pyramidalis muscle of the anterior abdominal wall.

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