Articularis Genu is composed of 3 or 4 muscular skids that are considered to be a separated part of the vastus intermedius.

Origin

It originates from the anterior surface of the lower part of the shaft of the femur, few centimetres above the patellar articular margin.

Insertion

Into the upper part of the synovial membrane of the knee joint.

Nerve Supply

It’s supplied by a twig from the nerve to vastus intermedius.

Actions

The articularis genu pulls up the synovial membrane upward to prevent its damage when the knee is extended.