282 



The Abdominal Muscles. 



M. obliquus interniis abdominis 

 (cut tlirough and reflected mediaiiward) 



M. tiansversus abdominis 

 I 



M. obllquns 



nterniis abdominis 



(cut tbrougli and 



reflected lateral- 



ward] 



M 



obliquus extern us 

 abdominis 

 (cut through and 

 reflected downward) 



Margo falciformi: 

 (cornu superius) 



M. obliquus 

 externus abdominis 



(cut through and 



reflected median- 

 ward) 



Posterior wall 

 (thin spot) 



Falx inguinalis 



M. crem aster 

 (cut away) 



Ligamentum 



inguinale 

 reflexum 



ICollesi] 



V. femoralis 



Funiculus 

 spermaticus 



327. Right inguinal canal in the male {3^^ layer), 



viewed from in front. 

 (The mm. obli(iui abdominis have been cut through above the inguinal canal and reflected 

 medianward and lateralward. The spermatic cord has been pressed somewhat downward within 



the inguinal canal.) 



Caiialis iu^uiualis (continued). Posterior wall (see also Fig. 328): m. transversus; 

 the lowermost fibers of the m. transversus arch downward on the median side of the posterior 

 abdominal ring, spread out in a divergent manner and become attached medianward to the 

 upper surface of the os pubis, lateralward to the upper margin of the lig. inguinale. The triangular 

 ])late thus arising furms the posterior wall of the inguinal canal and varies in strength at 

 different places. Medianward it contains a strip of strong tendinous fibers, faLv [ aponeurotica] 

 i/iffuinalis, which extends from above downward and medianward to the upper surface of the 

 jniltis, and becomes firndy attached by its medial border to the tendon of the m. rectus; m 

 front it is not rarely covered and strengthened by fibers of the m. obliquus internus (see 

 p. 281). In the lowermost portion of this strip tliere are also fibers which extend from the 

 lateral margin of the m. rectus abdominis, in curves, downward and lateralward (see Fig. 328); 

 not seldom they are more powerful than the others. The lateral part of the posterior wall is 

 strengthened by the lig. interfoveolare (see p. 283). 



The ligamentum inguinale reflextim [CoUesi] (see also Fig. 318) is a thin band of 

 fibers, one finger broad, which comes into view medial I'rom th^^anniilus mguinalis subcutaneus, 

 between the two crura. It extends from the medial end of the lig. inguinale and lig. lacunare 

 obliquely upward and medianward behind the crus superius to the anterior layer of th(> sheath 

 of the rectus and in so doing lies partly in front of the lowermost portion of the falx inguinalis. 



