NERVUS GLOSSO-PHARYNGEUS. 471 



bone; and anastomoses or joins with the superficial petrous 

 nerve. The other branch passes below the bony Eustachian 

 Tube, and, gaining the carotid canal, anastomoses there with 

 the Sympathetic Nerve. This is part of the anastomosis of Ja- 

 cobson, and is also described in the account of the Vjdian 

 Nerve.* The ganglion also gives off other filaments, which 

 join the pneumogastric nerve, the accessory and the sympathe- 

 tic. 



On issuing from the posterior foramen lacerum, the glosso- 

 pharyngeal is separated from the pneumognstric by the internal 

 jugular vein. It is then directed downwards and forwards be- 

 tween the internal carotid and the stylo-pharyngeus muscle, 

 afterwards between the latter and the stylo-glossus; it fol- 

 lows the direction of the latter to the side of the root of the 

 tongue. 



In this course, it sends off many filaments. Shortly after 

 leaving the cranium, it detaches one backwards to the digastric 

 branch of the facial, and another to the pneumogastric. It then 

 sends off two filaments, which descend along the internal and 

 common carotid, and are divided into several branches, some 

 of which anastomose with the pharyngeal branch of the pneu- 

 mogastric, others descend on the common carotid with filaments 

 from the pharyngeal branch, and being joined by two or three 

 small twigs from the superior cervical ganglion, they reach the 

 lower part of the neck, and concur in the forming of the super- 

 ficial cardiac nerve. Farther down after the origin of these 

 branches the glosso-pharyngeal detaches two or three filaments 

 to the stylo-pharyngeus muscle, as well as some to the upper and 

 middle constrictors of the pharynx, to the pharyngeal plexus of 

 the sympathetic and pneumogastric, and to the posterior lateral 

 and superficial part of the tongue. 



The glosso-pharyngeal nerve having got between the stylo 

 and hyo-glossus muscles, is placed intermediately to the lingual 

 branch of the fifth pair and hypo-glossal nerve. Some of its 

 branches then go to the integuments of the base of the tongue, 

 to its mucous glands, large papilla?, and may be traced to the 

 mucous membrane of the soft palate, to the amygdala?, and to 

 the covering membrane of the epiglottis. Others go into the 



* See Nerves of Org.n of Hearing-. 



