634 



HUMAN ANATOMY. 



dially along Poupart's ligament to the body of the pubis ; thence it passes backward 

 and downward along the inferior rami of the pubis and ischium to the ischial tuberos- 

 ity, where it passes upon 



Crest of ilium 



Gluteus 

 rtiedius 



Sacral and 

 ligamentous 

 origin of glu- 

 teus maximus 



Gluteus 

 maximus 



reater 

 trochanter 



Gracilis 



Adductor- 

 magnus 



uteus maxi- 

 mus, insertion 



Fig. 607. the greater sacro-sciatic 



ligament and so back to 

 the starting-point. Below 

 it is attached to the bor- 

 ders of the patella and be- 

 comes continuous with the 

 fascia of the leg. 



The fascia lata varies 

 considerably in thickness 

 in different regions. Over 

 the gluteal region it is thin, 

 but o\'er the great tro- 

 chanter of the femur it 

 becomes greatly thick- 

 ened, and this thickening 

 is continued downward 

 upon the lateral surface of 

 the thigh (Fig. 605) as 

 far as the external tuber- 

 osity of the tibia, forming 

 what is termed the ilio- 

 tibial band (tractus ilio- 

 tibialis). This receives at 

 its upper part the inser- 

 tions of the tensor fasciae 

 latae and part of the glu- 

 teus maximus, and from 

 the posterior edge of its 

 upper portion a much 

 smaller and feebler band 

 can be traced backward at 

 first across and then below 

 the lower portion of the 

 gluteus maximus to the 

 ischial tuberosity ; it pro- 

 duces the gluteal stilctis. 



In its lower posterior 

 part, where it forms the 

 roof of the popliteal space, 

 the fascia is also somewhat 

 thickened. 



Anteriorly, just below 

 the inner end of Poupart's 

 ligament, a prolongation 

 of the fascia passes deeply 

 to join with the ilio-pec- 

 tineal portion of the iliac 

 fascia, and so assists in the 

 formation of the sheath for 

 the femoral \essels. Over 

 an oval area, situated 

 immediately external to 

 where this prolongation, 

 which is termed the pubic 

 portion (Fig. 53b) of the fascia lata, is given off, the fascia lata is quite thin and is 

 perforated by the internal saphenous vein, superficial blood-vessels, and lymphatics ; 



Semijtendinosus 



Semimembranosus 



.Vastus externus 



Sem i ni embranosus 



Sartorius 



Gracilis, tendon 



astrocnemius 



Superficial dissection of pfislerior surface of right buttock and thigh, 

 showing niusclcs undisturbed. 



