The psoas minor is a muscle of the posterior abdominal wall. It is a long thin muscle, located anterior to the psoas major. It is only present in 60% of the population. Attachments: Originates from the vertebral bodies of T12 and L1 and attaches to a ridge on the superior ramus of the pubic bone, known as the pectineal line. Actions: Flexion of the vertebral column. Innervation: Anterior rami of the L1 spinal nerve. Blood supply: Lumbar arteries. By TeachMeSeries Ltd (2025) Fig 1Muscles of the posterior 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