428 



THE MUSCULATURE 



The ventral layer of the lumho-dorsal fascia and its relations to the abdominal muscles also 

 merit attention. This lies between the intrinsic dorsal musculature and the quadratus lum- 

 borum muscle and extends from the twelfth rib to the ilio-lumbar ligament. It is strengthened 

 by the lumbo-costal ligament, which extends between the transverse processes of the first and 



Fig. 387. — Superficial Musculature of Abdomen and Thigh. 



Pectoralis major 



Origin of pectoralis 

 major from aponeu- 

 rosis of obliquus ex- 

 ternus 



Obliquus externus 



Linea semilunaris 



Tensor fasciae latse 



Ilio-tibial band 



Trapezius 

 Serratus anterior 



Latissimus dorsi 



Gluteus mazimus 



Tendon of biceps 



second lumbar vertebrae and the twelfth rib, and by fibrous processes which extend into it 

 from the transverse processes of the lumbar vertebra- to which it is attached. With the lateral 

 margin of this ventral layer the dorsal layer of the luinbo-dorsal fascia is fusecl. The dorsal 

 aponeurosis of the transversus nmscle is iiiiit(!(l to the liiiiil)o-dorHal fascia at the Hnc of junction 

 of the ventral mid dorsal layers. TIk^ intcrmil ol)lique muscle, covered externally by a 

 fascia continued donsally from the exteniMl oblicpie, arises in part from the dorsal layer of the 

 lumbo-dorsal fascia near the junction of the two layers. 



