Vast the lateral one (vast external) is most of the muscle femoral quadriceps. It is originated by an ample aponeurosis, that is enclosed to the superior part of the intertrochanteric line, in the edges previous and inferior of greater trochanter, for the lateral lip of the gluteal tuberosity, and superior half of the lateral lip of the rough line, which covers the aponeurosis many fibers superior with three fourth parts of the muscle, and of its deep surface they are originated.

The fibers of an additional one of many problems of the sinew of the Maximus Glutæus, and vast the lateral in term muscular partition between lateral and the short head of the biceps femoral. The fibers form a great fleshy mass, that is enclosed to a strong aponeurosis placed in the deep surface of the inferior part of the muscle: this aponeurosis is contracted and thickening in an inserted flat sinew in the lateral edge of the lozenge, mixing itself with the sinew of the femoral quadriceps, and giving an expansion in the capsule of the joint of the knee.