98 A MANUAL OF ANATOMY. 



Nerve Supply. The glossopharyngeal. 

 Action. To raise the pharynx and larynx. 



The Glossopharyngeal Nerve. Figs. 10, II, 18. 



This is found in the dissection of the neck, as it curves for- 

 ward around the outer side of the stylopharyngeus muscle. 



It leaves the skull through the jugular foramen, in the 

 central compartment, with the tenth and eleventh nerves. 



It runs forward between the internal jugular vein and the 

 internal carotid artery, then winds around the outer border 

 of the stylopharyngeus muscle to terminate in the under 

 surface of the hyoglossus muscle. 



Branches. The glossopharyngeal nerve supplies the 

 stylopharyngeus muscle, then gives off small filaments to 

 help form the pharyngeal plexus, and to supply the tonsil 

 and tongue. 



The Internal Carotid Artery. Figs. 16, 17, 18. 



This begins at the same point as the external, viz. : at 

 the bifurcation of the common carotid, at the level of the 

 upper border of the thyroid cartilage. 



It passes directly upward to the base of the skull, being 

 internal to the external carotid, and separated from it by 

 the structures mentioned on page 93. 



Relations. See the relations of the external carotid, page 

 92. 



In the beginning of its course the artery lies in the su- 

 perior carotid triangle, and then within the submaxillary 

 triangle. As it passes upward it rests upon the rectus 

 capitis anticus major, the superior cervical sympathetic 

 ganglion, and the pneumogastric nerve. Behind it is the 

 internal jugular vein, which, near the base of the skull, is 

 separated from the artery by the hypoglossal, pneumogas- 

 tric, glossopharyngeal, and spinal accessory nerves. 



