348 



The cermcofacial division descends through the parotid, 

 joining branches of the great auricular, and divides, near the 

 angle of the jaw, into buccal, supramaxillary, and inframaxillary 

 branches. 



The buccal cross the masseter, supply the' buccinator and 

 orbicularis oris, and join the infraorbital nerves and the buccal 

 nerve from the inferior maxillary. 



The supramaxillary, beneath the depressor anguli oris, 

 supplies the inferior labial muscles, and joins branches of the 

 inferior dental. 



The inframaxillary pierces the deep cervical fascia, supplies 

 the platysma, and forms arches in the suprahyoid region, 

 joining the superficial cervical nerve. 



The Auditory Nerve 



The eighth or auditory is the special nerve of the sense of 

 hearing. Superficially it appears at the lower border of the 

 pons, external to the facial. It has two roots one from the 

 inner side of, and one from the front of, the restiform body. 

 It runs to the internal auditory meatus with the facial nerve, 

 the two being separated by the pars intermedia and the audi- 

 tory artery. The nerve in the meatus divides into a cochlcar 

 and a vestibular branch, whose distributions within the r;ir 

 are described under the special sense of hearing. 



The Ninth Nerve 



The ninth or glossopharyngeal arises superficially by several 

 filaments from the dorsolateral groove at the upper part of the 

 medulla; deeply through the lateral tract to a gray nucleus in 

 the floor of the fourth ventricle. 



The nerve runs in front of the flocculus to pass through the 

 middle part of the jugular foramen with the vagus and spinal 

 accessory, in a separate sheath, and here presents two succes- 

 sive ganglionic enlargements, the jugular and the petrous 

 ganglia. Outside the cranium it passes between , the jugular 

 vein and the internal carotid artery, descending in front of 

 the latter, and beneath the styloid process and its muscles, 

 to the lower border of the stylopharyngeus. It then crosses 



