Articular muscle of the knee--articularis genus.

Articularis genus has been considered by many as a part of the quadriceps muscle. Our observations have confirmed our opinion that this is a separate and distinct muscle. It is always present and has a discrete origin and insertion. This muscle has a very important function to perform. It elevates the capsule and the synovial membrane of the knee joint and prevents them from being pinched during extension of the leg. Thus it plays a very important role in the erect posture of humans.