Popliteus muscle is a small muscle which is often described as the key of the knee joint. It unlocks the knee joint by rotating the femur at the beginning of knee flexion to allow full knee flexion to occur.

Origin

  • Lateral condyle of the femur

Insertion

  • Upper posterior surface of the tibia, above the soleal (popliteal) line

Actions

  • Knee flexion
  • Internal rotation of the knee when it is flexed

Innervation

  • Tibial nerve

Daily uses

  • Walking

How can I strengthen it?

Related Articles

Biceps Femoris

Biceps Femoris is one of the three muscles which form the hamstring group. The muscle is often described as having a long head (the attachment from the ischium) and a short head (attached to the...

Semitendinosus

When running the hamstrings act eccentrically to slow down the knee extension motion. Hamstring strains are common in individuals with chronically tight hamstrings or who do not warm-up thoroughly.

Vastus Lateralis Muscle

Vastus Lateralis is the most lateral (outside) of the four quadriceps muscles. It is thought to be a major contributor to patella tracking injuries.

More Human Muscles: