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Saturday November 21, 2009 |
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Muscles of the Lower Extremity / Biceps Femoris - Long Head
Page: 1
| Origin |
Long head from common tendon with semitendinosus from superior medial quadrant of the posterior portion of the ischial tuberosity; short head from lateral lip of linea aspera, lateral supracondylar ridge of femur, and lateral intermuscular septum of thigh |
| Insertion |
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle |
| Action |
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint |
| Innervation |
Long head by tibial nerve; short head by common peroneal nerve |
Arterial
Supply |
Perforating branches of profunda femoris artery, inferior gluteal artery, and the superior muscular branches of popliteal artery |
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