Mammalia: Skin, Muscles, Skeleton 



589 



SPLEN. CAR 



ATLANTOSCAP POST. 



-ATLANTOSCAP ANT. 



TRAPEZIUS 



..SUPRASPINATUS 



^RHOMB. DORSI 



TERES MAJOR 



'\SERRAT POST. INF. 



Fig. 456. The superficial dorsal muscles of the rhesus monkey. On the right 

 side, the trapezius and latissimus dorsi have been removed, exposing the deeper 

 extrinsic back musculature. (Courtesy, Hartman and Straus: "Anatomy of the 

 Rhesus Monkey," Baltimore, Williams Wilkins Co.) 



sternum to the pelvic girdle (Figs. 454, bottom; 458; 460). The fibers 

 of the rectus muscles extend longitudinally and may be interrupted by 

 several narrow transverse bands of connective tissue (inscriptiones 

 tendineae), which are commonly regarded as persistent myoseptums. 

 The muscles which are most important in effecting the bending 

 movements of the trunk constitute an extremely elaborate system 

 massed along the vertebral column. Most conspicuous of these is the 

 longissimus dorsi, which begins at the sacrum and pelvis and ex- 

 tends forward, one on each side, dorsal to the vertebral column and 

 lying in the angle between the neural spines and the transverse proc- 

 esses of the vertebrae (Figs. 457, 458). It traverses the entire length 

 of the trunk and has complex relations to many vertebrae. Along the 



