It arises from the anterior surface of the lower part of the body of the femur, deep to the vastus intermedius, close to the knee and from the deep fibers of the vastus intermedius.
12.
It arises from the anterior surface of the lower part of the body of the femur, deep to the vastus intermedius, close to the knee and from the deep fibers of the vastus intermedius.
13.
Historically considered a part of the vastus lateralis, the tensor vastus intermedius muscle is innervated by an independent branch of the femoral nerve and its tendinous belly can be separated from the vasti lateralis and intermedius muscles in most cases.
14.
The lateral surface includes the portion between the lateral border and the linea aspera; it is continuous above with the corresponding surface of the greater trochanter, below with that of the lateral condyle : from its upper three-fourths the Vastus intermedius takes origin.
15.
From the upper three-fourths of this surface the Vastus intermedius arises; the lower fourth is separated from the muscle by the intervention of the synovial membrane of the knee-joint and a bursa; from the upper part of it the Articularis genus takes origin.
16.
The vastus medialis and vastus intermedius appear to be inseparably united, but when the rectus femoris has been reflected a narrow interval will be observed extending upward from the medial border of the patella between the two muscles, and the separation may be continued as far as the lower part of the intertrochanteric line, where, however, the two muscles are frequently continuous.
