CHAPTER III 



MUSCLES 



Remove the skin and dissect away the fat and tis- 

 sue covering the muscles. 



A thin layer of muscular fibres covers the neck, 

 thorax, and abdomen, immediately below the 

 skin. The portion upon the neck is known as 

 the platysma myoides. These muscles will be 

 seen as numerous delicate fibres, which remain at- 

 tached to the skin when it is removed. 



MUSCLES OF THE ABDOMEN. 



I. The External Oblique Muscle is a thin, flat mus- 

 cle, arising by digitations from the nine posterior 

 ribs and the lumbar fascia. Its fibres run obliquely 

 backward toward the mid-ventral line, and end in 

 a thin, broad aponeurosis, which unites with its 

 fellow of the opposite side. This extends from the 

 level of the seventh costal cartilage to the sym- 

 physis pubis to which it is attached. A mid-ven- 

 tral white line, the linea alba, indicates the union 

 of the aponeuroses of the muscles of the two sides. 

 A band of delicate fascia, Pouparfs ligament, 

 forms the posterior free edge of the muscle, just in 

 front of the ilium. Near the symphysis pubis this 



