Jii OF THE 



D.) 



THE MUSCLES OF THE NECK. 



the nei I lude tl 



1, the hyoid mus< les, ical m 1 ' ■ hyoid mus 



hyoid and the infrahyoid group; thc< 



an ini i ip, the prevertebral mu 



I platysma m. Figs, o and 



which is situated in the nnective ti , theu] 



an<l the lo tl aris< s (Fig. 



and the deltoid at the level of th< nd rib, by 



separated by intei level of the clavicle th< ili unit< I I 



hich leaves uncovered the anti 

 ly the lateral cervical, t ; leidomastoid, the i 



regi ard the chin the mai fthetwomus and m< 



mental lently interla< 



the fibers of the platysma i mandi 



the rest pa r the mandible and a] lally dis the 



parotideo-ma . ind partly by intermingling with the ri 



which they rea< h th I the mouth. 



T! 

 thon 



■ 



The sternocleidomastoideus Figs. 

 thick muscle which is situated in the cleidon 



»ng, thick, tendini ternalh im the anteri 



tendinous, clavicular head from the - I of the clavi 



The sternal head ; 

 ice of varj ing size, 1 ilar head. I: 



becomes much wider as sses upward I the thi and 



partly als the clavicular portion. 



The sternocleidomastoid is inserted into thi the I m- 



poral bone and into the outer half of tin : >>r nuchal lin< o of the insertion 



being effected by a short, the by a long tendon. 



The muscle passes obliquely through the neck from below upward and from within outward. 

 At its insertion it borders upon the trapezius (see page 145), with th< :or margin of which 



