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Saturday November 21, 2009 |
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Muscles of the Lower Extremity / Obturator Internus
Page: 1
| Origin |
Internal surface of obturator membrane and posterior bony margins of obturator foramen |
| Insertion |
Medial surface of greater trochanter of femur, in common with superior and inferior gemelli |
| Action |
Rotates the thigh laterally; also helps abduct the thigh when it is flexed |
| Innervation |
Nerve to the obturator internus and superior gemellus -- a branch of the sacral plexus (L5, S1) |
Arterial
Supply |
Internal pudendal and superior and inferior gluteal arteries | |
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