AnatomyDeck

Muscle

Biceps femoris

Lateral hamstring

Lower limbMuscular system

High-yield

Only hamstring that laterally rotates the leg; short head is the one hamstring part supplied by the common fibular division.

Overview

The lateral hamstring with long and short heads; it flexes the knee and laterally rotates the flexed leg. Its tendon is the lateral border of the popliteal fossa.

Reference facts

  • Origin

    Long head: ischial tuberosity. Short head: lateral lip of the linea aspera

  • Insertion

    Head of the fibula

  • Action

    Flexes the knee and laterally rotates the flexed leg; long head extends the hip

  • Innervation

    Long head: tibial division of the sciatic (L5–S2). Short head: common fibular division (L5–S2)

  • Blood supply

    Perforating branches of the deep femoral artery

Your notes