Piriformus
O: Anterior Surface of Sacrum
Obturator Internus
O: Inner Surface of Obturator Membrane
Gemellus Superior
O: Ischial Spine
Quadratus Femoris
O: Ischial Tuberosity
Obturator Externus
O: External Surface Obturator Membrane
Gemellus Inferior
O: Ischial Tuberosity