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lateral rotator group
The lateral rotator group are a group of six small muscles of the hip which all externally (laterally) rotate the femur in the hip joint. It consists of the following muscles: Piriformis, gemellus superior, obturator internus, gemellus inferior, quadratus femoris and the obturator externus.
All muscles in the lateral rotator group originate from the hip bone and insert on to the upper extremity of the femur. The muscles are innervated by the sacral plexus (L4-S2), except the obturator externus, which is innervated by the lumbar plexus.
==Individual muscles==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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