Hip External Rotators

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Other Names Six Deep Lateral Rotator Hip Muscles Heads Piriformis Gemellus Superior Obturator Internus Gemellus Inferior Obturator Externus Quadratus Femoris Movement Hip External Rotation [1, 2, 3, 4, 5, 6 ] Transverse Abduction [1, 5 ] Attachments Origin Sacrum Anterior [1 ] Sacrotuberous Ligament [1 ] Ischium Posterior Portions Ischial Spine [2 ] Ischial Tuberosity Posterior Portion [4 ] External Border [6 ] Obturator Foramen [5, 6 ] Ischium and Pubis Inside Surfaces and Obturator Membrane [3 ] Insertion Femur Greater Trochanter Medial Surface [2, 3, 4 ] Superior/Medial Surface [1 ] Posterior Surface Quadrate Tubercle [6 ] Trochanteric Fassa [5 ] Comments Gemellus Superior [2 ] and Gemellus Inferior [4 ] also known collectively as Gemelli.