MUSCLES ON POSTERIOR NECK AND BACK. 



489 



inserted into the outer third of the clavicle, the acromion 

 process, and the superior edge of the spine of the scapula. 



Function. -To draw the shoulder toward the spine. Its 

 superior fibres can also raise the shoulder, while the in- 

 ferior can depress it. FIG. 149. 

 The head can also he 

 inclined backward and 

 to the one side by it. 



The ligamentum nu- 

 chce is composed of 

 cellulo-1 igainentous 

 matter, broad above, 

 extending from the ex- 

 ternal occipital protu- 

 berance along the me- 

 dian line, and attached 

 to the spinous pro- 

 cesses of all the cervi- 

 cal vertebras. It forms 

 a complete partition 

 between the muscles 

 upon the two sides of 

 the neck. It is very 

 powerful in the ox, 

 and is of great use in 

 supporting the head 

 and in giving attach- 

 ment to muscles. 



The latissimus dorsi, as its name implies, is truly the 

 broad muscle of the back. It is situated immediately be- 

 neath the skin, covering the whole of the lower part of the 

 back and loins, and arises by a thin tendinous membrane, 

 from the six inferior spines of the back, and by the fascia 

 lumborum, from all the spines of the loins and sacrum ; also 



FIG. 149 represents the Superficial Muscles of the back and neck. 1 Trape- 

 zius. 2 Latissimus-dorsi. 3 Infra-spinatus. 4 Teres minor. 5 Teres major. 

 6 Obliquus externus. 7 Serratus magnus. 8 Pectoralis major. 11 Sterno- 

 mastoid. 12 Deltoid. 16 Gluteus maximus. 



