Origin: the margin of bone immediately around the medial side of the obturator foramen, from the rami of the pubis and the inferior ramus of the ischium; Insertion: posterior aspect of the greater trochanter; Action: External Rotation of femur at the hip; Synergists: Periformis, Gemellus Superior, Gemellus Inferior, Obturator Internus, Quadratus Femoris; Nerve Supply: Sacral plexus, L5, S1, S2; (See Innervation) note: the nerve to the obturator externus travels thru the Greater Sciatic foramen; Suplied by the Obturator artery
