
Other Names
- Six Deep Lateral Rotator Hip Muscles
Heads
- Piriformis
- Gemellus Superior
- Obturator Internus
- Gemellus Inferior
- Obturator Externus
- Quadratus Femoris
Movement
- External Rotation [1, 2, 3, 4, 5, 6 ]
- Transverse Abduction [1, 5 ]
- Internal Rotation [1] (see comments)
Attachments
- Sacrum
- Anterior [1 ]
- Sacrotuberous Ligament [1 ]
- Ischium
- Posterior Portions
- Ischial Spine [2 ]
- Ischial Tuberosity
- Posterior Portion [4 ]
- External Border [6 ]
- Obturator Foramen [5, 6 ]
- Posterior Portions
- Ischium and Pubis
- Inside Surfaces and Obturator Membrane [3 ]
- Femur
- Greater Trochanter
- Medial Surface [2, 3, 4 ]
- Superior/Medial Surface [1 ]
- Posterior Surface
- Quadrate Tubercle [6 ]
- Trochanteric Fossa [5 ]
- Greater Trochanter
Comments
Gemellus Superior [2 ] and Gemellus Inferior [4 ] also known collectively as Gemelli. Insertion of piriformis is high up on greater trochanter, so it assists in external rotation from anatomical position, but when hip is flexed, piriformis assists in internal rotation of hip.