2 4 



THE INFERIOR EXTREMITY 



The arrangement of the fascial lining of the abdominal 

 cavity, with reference to this interval of communication 

 between abdomen and thigh, also requires attention. The 

 lower part of the posterior wall of the abdomen, immedi- 

 ately above the thigh, is formed by the iliacus and psoas 

 muscles. These are covered by that part of the fascial 

 lining of the abdomen which receives the name of the fascia 



Transversalis fascia 



Transversus abdomini^ 

 1 Internal oblique 

 ^"External ob 



Skin 

 Camper's fascia 



Superficial epi- 

 gastric vein 



Aponeurosis of external 

 oblique 



Scarpa's fascia " 

 Inguinal ligament 

 Transversalis fascia 

 Cribriform fascia 



Fascia lata 



Great saphenous vein 



Inguinal canal 



Transversalis fascia 



Inguinal ligament 



Ilio- psoas 

 I ^//^V^External iliac vein 



^yv Iliac fascia 



Femoral vein 



FIG. no. Diagram of the Fasciae and Muscles of the Inguinal and 

 Subinguinal Regions in the line of the Fossa Ovalis. 



iltaca. 1 The anterior wall of the abdomen is lined, in like 

 manner, by a portion of the general lining, termed the fascia 

 transversalis. To the lateral side of the femoral vessels these 

 two fascial layers become continuous with each other, and at 

 the same time are attached to the back of the inguinal liga- 

 ment (Fig. 105). It is behind this union that the ilio-psoas, 

 the femoral nerve, and the lateral cutaneous nerve of the 

 thigh are carried distally into the thigh. But the external 



1 The dissector must bear in mind the distinction between the fascia iliaca 

 and the iliac portion of the fascia lata. The former is a part of the general 

 fascial lining of the abdomen, and the latter is a part of the deep fascia of 

 the thigh. 



