Plantaris

The plantaris (also plantaris muscle, latin: musculus plantaris) is a superficial muscle of the posterior group of the lower leg muscles. The plantaris consists of a belly and a long thin tendon.

Origin

The plantaris originates from the lateral condyle of the femur.

Insertion

The plantaris passes inferomedially and inserts into the Achilles tendon.

Action

The plantaris plays role in flexion of the knee and foot.

Innervation

The plantaris is innervated by the tibial nerve that arises from the sciatic nerve of the sacral plexus.