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Lateral rotaters of hip
 

Lateral rotaters of hip

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Lateral rotaters of hip

Lateral rotaters of hip

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    Lateral rotaters of hip Lateral rotaters of hip Presentation Transcript

    • Lateral Rotators of Hip
    • The lateral rotators are: 1.The superior gemellus 2.Inferior gemellus 3. Obturator externus 4. Obturator internus 5. Quadratus femoris 6. The piriformis
    • Superior and Inferior Gemellus
    • 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.
    • Piriformis
    • 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.
    • Obturator Externus and Internus
    • 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.
    • Quadratus Femoris
    • Rectangular muscle that originates on the ischial tuberosity and inserts onto the intertrochanteric crest.