THE HIP AND THIGH 



1437 



leg is extended. On either side of this muscle is a furrow, and on either side, again, of this 

 furrow the vasti become prominent. Between the vastus mediahs and adductor muscles is a 

 depression indicating the adductor canal. At the upper and medial third of the thigh, if the 

 limb be abducted, the upper part of the adductor longits comes into strong rehef. On the medial 

 side below, above the knee-joint, the vertical fibres of the adductor magnus end in a powerful 

 tendon coming down to the adductor tubercle (fig. 1159). This replaces here the medial inter- 

 muscular septum, and the insertion of the tendon marks the level of the lower epiphysial line 

 of the femur. At the lateral and back part of the thigh the vastus lateralis is separatedfrom the 

 biceps by a groove which indicates the lateral intermuscular septum. Of these septa, prolonga- 

 tions inward from the fascia lata to the linea aspera, the lateral lies between the vastus lateralis 

 and the biceps. It reaches from the lateral tuberosity of the femur to the insertion of the gluteus 

 maximus. Just above the condyle it is perforated bj^ the superior lateral articular vessel and 

 nerve. The medial septum extends from the adductor tubercle to the trochanter. It is weak in 



Fig. 1155. — The Muscles attached to the Pubes. 

 (From a dissection in the Hunterian Museum.) 

 External oblique- 



Rectus abdominis 



Pectineus 



Adductor longus 



Corpora cavernosa 

 Adductor brevis; 

 adductor magnus 

 and obturator 

 extemus 

 Corpus spongiosum 

 (cavernosum 

 urethrse) 



Trans vers us 

 perinei prof. 

 Bulb-cavernosus 



Quadratus femoris 



Semi-tendinosus and 

 biceps below 



Rectus abdominis 

 Pectineus 



Adductor longus 

 Adductor brevis 



Obturator 

 ■. externus 

 \ Adductor magnus 

 Gracilis 



Ischio-cavernosus 



Transversus perinaei 



Central tendinous point 



Sphincter ani 



comparison, and separates the adductor from the vastus medialis. A third, the weakest of all, 

 separates the adductor and the hamstrings. The fascia lata has the same effect as that in the 

 neck in causing pus to burrow, especially downward, and in rendering the diagnosis of swellings 

 beneath it difficult. Thickest above and on the lateral aspect, and again about the bony promi- 

 nences at the knee-joint, at both of which sites it receives accessions from muscles, it is divided 

 into iliac and pubic portions. The former is attached behind to sacrum and coccyx, iliac crest 

 and the inguinal ligament, terminal Une and pubic tubercle. Here it blends vdih. the pubic 

 portion, which is connected with the pubic arch. At the fossa ovalis (saphenous opening) the 

 two may be said to separate, the iliac forming the upper cornu and lateral falciform margin, 

 and descending over the femoral vessels and extensors. The pubic, much thinner, forms the 

 medial margin of the fossa, and descends obhquely over the pectineus and adductor longus 

 behind the vessels, to blend with the sheath of the ilio-psoas and capsule of the hip-joint. 



