Biceps Femoris Muslce

Proximal attachment: Long head: ischial tuberosity; short head: linea aspera and lateral supracondylar line of femur
Distal attachment: Head of fibula, lateral condyle of tibia
Innervation: Longe head: tibial portion of sciatic nerve (L5, S1, S2); Short head: common fibular portion of sciatic nerve (L5, S1, S2)
Action: Knee flexion, hip extension, and ER of tibia in knee flexion

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