562 A MANUAL OF ANATOMY. 



anterior and outer surfaces of the thigh nearly to the knee. 

 Just below the spine of the ilium it gives off a branch 

 which turns backward to supply the integument over the 

 great trochanter. 



The Internal Cutaneous Nerve. Figs. 115, 117. 



It descends across the femoral artery and divides into 

 two branches : an anterior, which pierces the fascia lata at 

 the middle and lower thirds of the thigh and supplies the 

 integument of the inner anterior surface of the lower third 

 of the thigh. 



It descends across the vessels and gives off branches 

 which perforate the fascia lata at various levels to supply 

 the integument of the inner surface of the thigh. The 

 two terminal branches are described as the anterior and 

 posterior branches. The anterior is distributed to the 

 front of the lower third of the thigh and knee, while the 

 posterior branch extends downward to the upper third of 

 the back of the leg. 



The Middle Cutaneous Nerve. Figs. 115, 117. 



May exist as a single or double trunk. It (or one of the 

 divisions) usually pierces the sartorius muscle, then the 

 fascia lata at the upper and middle thirds of the thigh, and 

 supplies the integument of the front and inner sides of the 

 thigh to the knee. 



DISSECTION. 



Carefully remove the fascia lata, with the superficial vessels and nerves, from 

 the front of the thigh ; leaving Poupart's ligament intact above ; the ilio- 

 tibial band on the outside ; and exposing the gracilis muscle on the inside. . 



Sartorius. Fig. 1 1 7. 



Origin. From the anterior superior spine of the ilium 

 and the upper part of the notch below. 



