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. Adobe Stock, Licensed to TeachMeSeries Ltd Fig 1The pyramidalis muscle of the anterior abdominal wall. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article