Lateral rotaters of hip

Lateral rotaters of hip

1. Lateral R otators of Hip

2. The lateral rotators are: 1.The superior gemellus 2.Inferior gemellus 3. Obturator externus 4. Obturator internus 5. Quadratus femoris 6. The piriformis

3. Superior and Inferior Gemellus

4. Origin : on the ischium Insertion : on the medial surface of the greater trochanter Both muscles, in addition to helping rotate the hip joint laterally, help to abduct the flexed thigh.

5. Piriformis

6. Origin : on the anterior surface of the lateral process of the sacrum and gluteal surface of the ilium at the margin of the greater sciatic notch. Insertion : on the superior border of the greater trochanter .

7. Obturator Externus and Internus

8. The externus originates : on the external surface of the obturator membrane and the margins of obturator foramen (the hole created by the pubis and ischium ) The internus originates : on the inner surface of the obturator foramen and the surfaces of the surrounding bones. Insertion : onto the posteromedial surface of the greater trochanter .

9. Quadratus Femoris

10. Rectangular muscle that originates on the ischial tuberosity and inserts onto the intertrochanteric crest.