Muscles of the Nook. 



255 



Porus 

 aeuslious - 

 extenuis 



Processus 



niastoideus 



Processus styloideus 



M. masscter 



M. digastripus 

 (venter posterior 



M. splenius capitis 

 M. stylohyoideus 



!M. levator scapulae 

 M. trapezius (cut through) 



M. scalenus medius ~- 



M. scalenus posterior 



M. serratus 

 anterior 

 .M. supra- 

 spinatu 



-- M. digastric 

 Loop for the (ventr 

 111. digastiicus antcric 

 Corpus ossis hyoidei 



M. constrictor pliaryngis 

 inferior 



^[. tlivreohvoideus 



1\[. sternothvreoidcus 



M. slernobvoideus 



M. omohvoideus 



v^^mtm^ 



V 



Acromion 



Clavicula 



301. Muscles of the neck [V^ layer), vieAved from the right side. 



(The platysma, m. sternocleidomastoideus and the anterior part of the m. trapezius 



have been removed.) 



M. sternohyoideus (see also Figs. 298 300). Form: flat, oblong-quadranguhir, thin. 

 Position: on the anterior surface of the neck in front of the larj-nx and the tra(;hea, cove- 

 red above by the platysma only , below by the m. sternocleidomastoideus ; the muscles of the 

 two sides approach very close to each other and sometimes even touch in the median line. 

 Origin: posterior surface of the manubrium sterni, of the articiilatio sternoclavicularis and of 

 the first costal cartilage (see Fig. 313). Insertion: the fibers run parallel to one another 

 upward, at first also somewhat medianward, and go to the corpus oss. hyoidei (bursa m. sterno- 

 liijoidei, see P'ig. 302 and p. 257). A c t i o n : it draws the hyoid bone downward. Innervation: 

 r. descendens n. hypoglossi. 



17* 



