Main Model


33  Biceps femoris muscle, short head

Biceps femoris
Proximal Attachment: Long head - Ischial tuberosity
                                           Short head - Linea aspera and lateral supracondylar line of femur
Distal Attachment: Lateral side of head of fibula; tendon is split at this site by fibular collateral ligament of knee
Innervation: Long head - Tibial division of sciatic nerve (L5, S1, S2)
                        Short head - Common fibular division of sciatic nerve (L5, S1, S2)
Main Action(s): Flexes leg and rotates it laterally when knee is flexed; extends thigh (e.g., accelerating mass during first step of gait)