Part III: Anatomy Of The Leg

Muscles

Plantaris

A posterosuperficial, lower leg compartment muscle, which is often forgotten about, because of its extremely small size (5-10 cm length).

  • Function is to flex the patella and plantar flex the foot.


Biceps Femoris (Hamstring)

A posterior, two-headed muscle located on the posterior portion of the thigh. The long head affixes to the ischium and the short head affixes to the femur.

  • Function is hip extension and patella flexion.

Adductor Magnus

The triangle-shaped muscle is located on the posterior, medial portion of the thigh and is the longest groin muscle.

  • Function is responsible for hip adduction.

Gluteus Maximus

The largest gluteal muscle that makes up a large portion of the buttocks.

  • Function is to extend, spread, and invert the upper leg.

Gluteus Medius

A gluteal muscle that is located on the outer portion of the pelvis. It makes up a portion of the buttocks.

  • Function is to abduction the hip.

Inferior Extensor Retinaculum (Ligament)

A y-shaped band located on the anterior portion of the talus and is affixed to the calcaneus.

  • Function is to prevent bowstringing, when the ankle is in use.


Superior Extensor Retinaculum (Ligament)

Horizontally extends the posterior portion of the leg and affixes to the fibula and tibia.

  • Function is to prevent bowstringing, when the ankle is being used.