THE PHARYNGEAL REGIOX 



397 



The Stylopharyngeus (m. stylopkaryngeus) is a long, slender muscle, cylindrical 

 above, broad and thin below. It arises from the inner side of the base of the 

 styloid process of the temporal bone, passes downward along the side of the 

 pharynx between the Superior and Middle constrictors, and spreads out beneath 

 the mucous membrane, where some of its fibres are lost in the Constrictor muscles; 

 and others, joining with the Palatopharyngeus, are inserted into the posterior 

 border of the thyroid cartilage. The glossopharyngeal nerve runs on the outer 

 side of this muscle, and crosses over it in passing forward to the tongue. 



ACCESSORY BUNDLE 

 FROM PETROSAL POR- 

 TION OF TEMPORAL 



STYLOID PROCESS 



EXPANSION OF 

 STYLOPHARYNGEUS 



EXPANSION OF 

 PALATOPHARYNGEUS 



1 P } (IP 



FIG. 307. The muscles of the pharynx. On the right side most of the Inferior constrictor has been removed, 

 on the left side the Digastric and Stylohyoid have been removed. (Spalteholz.) 



Relations. By its superficial surface, with the Styloglossus muscle, the parotid gland, the 

 external carotid artery, and the Middle constrictor; by its deep surface, with the internal carotid, 

 the internal jugular vein, the Superior constrictor, Palatopharyngeus, and pharyngeal mucous 

 membrane. 



Nerves. The Constrictors are supplied by branches from the pharyngeal plexus formed 

 by the vagus, glossopharyngeal, and sympathetic nerves. The Inferior constrictor also receives 

 an additional branch from the external laryngeal nerve and one from the recurrent laryngeal. 

 The Stylopharyngeus is supplied by a branch from the glossopharyngeal nerve. 



