BICEPS FEMORIS

ORIGIN
Long head: upper inner quadrant of posterior surface of ischial tuberosity. Short head:middle third of linea aspera, lateral supracondylar ridge of femur
INSERTION
Styloid process of head of fibula. lateral collateral ligament and lateral tibial condyle
ACTION
Flexes and laterally rotates knee. Long head extends hip
NERVE
Long head: tibial portion of sciatic nerve. Short head: common peroneal portion of sciatic nerve (both L5, S1)