The nerve to obturator internus originates in the sacral plexus. The acetabular branch of the obturator artery supplies the acetabulum through the acetabular notch. The arterial supply is by the femoral artery and the obturator artery. Its anterior border projects as the posterior obturator tubercle. It forms the upper edge of the obturator foramen. It works by affecting the femoral, obturator and the lateral cutaneous nerves. In front it is limited by the posterior margin of the obturator foramen. Vessels of the prostate itself also drain into the obturator and sacral lymph nodes. By its upper border with the obturator externus, and quadratus femoris. It is innervated by the obturator nerve. This patient had a cleft palate defect and required implants to support a palatal obturator. Failure of piriformis syndrome treatment may be secondary to an underlying internal obturator muscle injury. The internal obturator muscle is also innervated by the nerve to internal obturator (L5, S1). By its outer border with the obturator externus, and the iliopsoas. An obturator hernia is a type of hernia involving an intrusion into the obturator canal.