BICEPS FEMORIS
Origin
Long head: upper inner quadrant of post surface of ischial tuberosity. Short head:middle third of linea aspera, lat supracondylar ridge of femur
Action
Flexes and lat rotates knee. Long head extends hip
Insertion
Styloid process of head of fibula. lat collateral lig and lat tibial condyle
Nerve
Long head: tibial portion of sciatic N. Short head: common peroneal portion of sciatic N (both L5, S1)