DISSECTING MANUAL. 



FASCIAE AND MUSCLES. 



Fascice and Muscles of Abdominal Watt. 



Fascia. The superficial fascia is fatty and separated at the 

 groin into two layers; a superficial fatty layer which is con- 

 tinuous over Poupart's ligament with the fascia of the thigh ; 

 and a deeper membranous layer which is attached to the inner 

 half of Poupart's ligament and, more externally, to the fascia 

 lata of the thigh below Poupart's ligament. The deep fascia is 

 like the deep fascia elsewhere. [426] 



The fascia lining the abdomen (fascia transversalis) is a 

 continuous membrane, named according to its location. It 

 lines the Transversalis and is continuous with the diaphrag- 

 matic and iliac fasciae and, through the lumbar facia, the fasciae 

 of the Quadratus lumborum and Psoas. It forms the infundi- 

 buliform fascia, helps form the femoral sheath, and is separated 

 from the peritoneum by a thick and usually fatty layer of 

 extra-peritoneal tissue. [427] 



Obliquus Externus Abdominis (the most superficial an- 

 teriorly) . Origin ; outer surfaces of eight lower ribs, by slips 

 interdigitating with the Serratus magnus and Latissimus 

 dorsi. Course; radiates downward and forward. Insertion .; 

 anterior half or two- thirds of outer lip of iliac crest; ensiform 

 cartilage, symphysis pubis, and linea alba through its tri- 

 angular aponeurosis. This aponeurosis gives rise below to the 

 following structures : [427] 



Poupart's Ligament. This arched band is the lower limit of 

 the aponeurosis and extends from the anterior superior iliac 

 spine to the pubic spine. At its inner end a triangular band 

 (Gimbernat's ligament) of fibres is reflected horizontally back- 

 ward to the ileo-pectineal line. External abdominal ring : This 

 is an extensive split in the aponeurosis, just above the pubic 

 spine; its edges (pillars) are connected by a thin fascia 

 strengthened superficially by arched and horizontal fibres 



[190] 



