APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The piriformis muscle passes from the posterior pelvic region to the gluteal region through the greater sciatic notch. Its nerve supply passes through the anterior branches of the S2 and S3 sacral nerves arising from the sacral plexus (2, 3).

Detailed explanation-2: -The piriformis is a flat, narrow muscle. It runs from your lower spine through your butt to the top of your thighs. Your piriformis muscle extends to each side of your body and aids in almost every movement of your lower body. The sciatic nerve most commonly runs underneath the piriformis.

Detailed explanation-3: -Piriformis syndrome is a condition in which the piriformis muscle, located in the buttock region, spasms and causes buttock pain. The piriformis muscle also can irritate the nearby sciatic nerve and cause pain, numbness and tingling along the back of the leg and into the foot (similar to sciatic pain).

Detailed explanation-4: -The piriformis syndrome is caused by entrapment of the sciatic nerve at the level of the greater sciatic notch by the pyriformis muscle1, 15).