The Probert Encyclopaedia of Medicine

VASTUS INTERMEDIUS

The vastus intermedius (femoral muscle; crureas) is an extensive muscle that lies deep to all the other quadriceps bellies, adding muscular fullness under them. It originates from the anterior shaft of the femur and inserts in the tuberosity of the tibia with the tendon of the quadriceps femoris and the patellar ligaments. It is innervated by the femoral nerve and supplied by femoral circumflex artery. The quadriceps muscles consist of: the rectus femoris, the vastus lateralis, the vastus intermedius, and the vastus medialis. These muscles form a large fleshy mass that covers the front and sides of the femur. They work together as the primary extensor of the knee.
Research Vastus Intermedius