Structures passing above the pyriformis:-Superior gluteal nerve and vessels.It winds around greater sciatic notch.SUPERIOR GLUTEAL NERVE Root value: L4,L5,S1Course: enters the gluteal region through greater sciatic notch above pyriformis muscle. Runs between gluteus medius and gluteus minimus to end in tensor fascia lata.Branches :-it supplies 1. Gluteus medius 2. Gluteus minimus3. Tensor fascia lata {Reference: BDC 6E pg no. 173}