Received: 31 Dec, 2008 Accepted: 22 July, 2009 Abstract The sciatic nerve, posterior cutaneus nerve of thigh, and inferior gluteal nerve are branches of sacral plexus. They leave the pelvis via greater sciatic foramen and arises in gluteal region in infra piriformis fossa. The sciatic nerve usually divides at the upper angle of the popliteal fossa to common peroneal and tibial nerves. The...