UN \l;l OMINAL 



I i 

 l • 



THE ABDOMINAL MUSCLES. 



The abdominal muscles I d) form the anterior, the later 



tlu- posterior abdominal v. all. and i m the lower mar 



rhey are subdividi abdomina 



and and the posterior abdominal, the quadratus lumborum. 



THE ANTERIOR ABDOMINAL MUSCLES. 



THE FLAT ABDOMINAL MUSCLES. 



The flat abdominal muscles I include the obliquu 



abdominis in and the lr.: : the} :i three 1 



i the lateral and a portion of the anterior abdominal wall, 

 their lilxr-, the two oblique muscles may irded a- the din tinuati 



tales, tin- obliquu nus, in particular, lxinu r directly continu ith tlu I 



must 1' . 



I , obliquus abdominis externus I 

 rotic anteri n<.\ markedly so in its anterior inferior p 



toral, the hypochondriac, the epigastric, the n I and ui 



and the lr. nainal anil pubi< 



It arises by eigl from the eight (fifth to twelfth 



interdigitating with tin- 1" with t!. 



<>f the latissimus dorsi. l'he majority of the fibers of the n . like ti 



externi, run from above downward and from without inward; tlu 

 mewhat h< Kile the inferior ones approach a al direction. 



e fibers coming from the lower ribs hav< risivc fli 



lip of the f the ilium, extending anteriorly to the anteri 



almost to the outer margin ^i the latissimus The remain 



and pa ■ the inguinal (Poupart's) ligament, th< .vhich 



tendinous fasciculi of tlu- muscle see ; 1 to th rior la;. I the 



rectus, by m< ans <<\ which it i- continued to the linea alba. Almost the entin inal 



surface is [uently aponeurotic; especially in the lower abdomin the mu 



commence quite at tin- side. 



The obliquu- abdominis externus is in relation superiorly with the minal portion 



the pectoralis major, externally with the serratus anterior. : ally with the la: 



dorsi, with which it forms the lumbar (Petit's) triangle . . . and inferiorly with the 



