Biceps Femoris: Long Head - 3D - Animation

Video Description

Origin:
Common tendon with semitendinosus from superior medial quadrant of the posterior portion of the ischial tuberosity.

Insertion:
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle.

Action:
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint.

Innervation:
Tibial nerve (L5, S1, S2).

Arterial Supply:
Perforating branches of profunda femoris artery, inferior gluteal artery, and the superior muscular branches of popliteal artery.