Muscles of the Pharynx. 



19 



Cornu ma 

 oss. hyo 



Cornu super, 

 cart, thyreoid. 



347. The Muscles of the Pharynx, from behind, after 

 removal of the Vertebral Column. 



The longitudinal muscles of the pharynx are : the two M. stylo- 

 pharyngei, and the single M. azygos pliaryngis, which latter is often wanting. 

 The constrictor muscles of the pharynx, Constrictores pliaryngis, form 

 the lateral and posterior walls of the pharynx, and are all inserted into 

 the fibrous raphe in the posterior median line. They form three pairs : 



The M. constrictor superior arises from the hamular process of the 

 pterygoid plate of the sphenoid (Pterygo-pharyngeus) , from the mylo- 

 hyoidean line of the lower jaw (Mylo-pharyngeus), from the side of the 

 tongue (Glosso-pharyngeus) and from the Fascia bucco-pharyngea (Bucco- 

 pharyngeus). 



The M. constrictor medius arises from the greater cornu of tlie 

 hyoid bone (Cerato-pharyngeus), and from the lesser cornu (Chondro-pharyngeus). 



The M. constrictor inferior arises from the outer surface of the thyroid 

 cartilage (Thyreo-pharyngeus) and the cricoid cartilage (Crico-pharyngeus) . 

 The constrictors are so arranged, that the inferior partially covers the 

 middle and the middle the superior. 



3* 



