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Biceps Femoris

Origin: Pelvis (Ischial Tuberosity) & Femur (Linea Aspera and Lateral Supracondylar Line)

Insertion: Fibula (head) & Tibia (Lateral Condyle)

Action: Knee Flexion, Hip Extension, Lateral Rotation of Tibia when knee is flexed

Innervation: Long head: S1-3 (Tibial portion of Sciatic Nerve) & Short head: L5-S2 (Common Peroneal Nerve)