640 



SPECIAL SENSES 



from the glossopharyngeal go to the otic ganglion and to the carotid 

 plexus of the sympathetic. 



The distribution of the glosso-pharyngeal is quite extensive. The 

 tympanic branch (the nerve of Jacobson) arises from the anterior and 

 external parts of the ganglion of Andersch, and enters the cavity of the 

 tympanum, where it divides into six branches. Of these six branches, 



Fig. 158. Glosso-pharyngeal nerve (Sappey). 



i, large root of the fifth nerve; 2, ganglion of Gasser; 3, ophthalmic division of the fifth; 4, supe- 

 rior maxillary division; 5, inferior maxillary division ; 6, 10, lingual branch of the fifth, containing the 

 filaments of the chorda tympani ; 7, branch from the sublingual to the lingual branch of the fifth ; 

 8, chorda tympani ; 9, inferior dental nerve; n, submaxillary ganglion ; 12, mylo-hyoid branch of the 

 inferior dental nerve; 13, anterior belly of the digastric muscle; 14, section of the mylo-hyoid muscle; 

 15, 18, glosso-pharyngeal nerve ; 16, ganglion of Andersch ; 17, branches from the glosso-pharyngeal to 

 the stylo-glossus and the stylo-pharyngeus muscles ; 19, 19, pneumogastric ; 20, 21, ganglia of the pneu- 

 mogastric; 22, 22, superior laryngeal nerve; 23, spinal accessory; 24, 25, 26, 27, 28, sublingual nerve 

 and branches. 



two posterior are distributed to the mucous membrane of the fenestra 

 rotunda and the membrane surrounding the fenestra ovalis ; two an- 

 terior are distributed, one to the carotid canal, where it anastomoses 

 with a branch from the superior cervical ganglion, and the other to the 

 mucous membrane of the Eustachian tube ; two superior branches are 

 distributed to the otic ganglion and, as is stated by some anatomists, to 



