Piriformis - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The piriformis is a muscle of the gluteal region in the lower limb. It is an important landmark which divides the gluteal region into an inferior and superior part. Attachments: Originates from the anterior surface of the sacrum. The fibres travel inferiorly and laterally through the greater sciatic foramen to insert onto the greater trochanter of the femur. Actions: Lateral rotation and abduction of the lower limb. Innervation: Nerve to piriformis. Blood Supply: Superior and inferior gluteal artery By TeachMeSeries Ltd (2026) Fig 1The deep muscles of the gluteal region. By TeachMeSeries Ltd (2026) Fig 2The piriformis as an anatomical landmark in the gluteal region. 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 Pro Feature - Dissection Atlas The gluteus maximus has been dissected away to reveal the gluteus medius. The sciatic nerve emerges into the gluteal region inferiorly to the piriformis. The gluteus maximus has been dissected away to reveal the gluteus medius. The sciatic nerve emerges into the gluteal region inferiorly to the piriformis. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the piriformis muscle? The piriformis muscle is located in the gluteal region of the lower limb and serves as a key anatomical landmark, dividing the area into superior and inferior sections. Where does the piriformis muscle originate and insert? The piriformis originates from the anterior surface of the sacrum and inserts onto the greater trochanter of the femur after travelling through the greater sciatic foramen. What actions are performed by the piriformis muscle? The primary actions of the piriformis muscle include lateral rotation and abduction of the lower limb, contributing to hip movement and stability. How is the piriformis muscle innervated? The muscle is innervated by the nerve to the piriformis, which is essential for its function and movement control. What is the blood supply to the piriformis muscle? The piriformis receives its blood supply from both the superior and inferior gluteal arteries, ensuring adequate oxygen and nutrients for muscle activity. Rate This Article