258 



NERVOUS SYSTEM. 



THE NERVOUS SYSTEM.-Continued. 



The Eighth Pair (Willis) includes the gth GLOSSOPHARYNGEAL, icth PNEUMO 

 GASTRIC, and nth SPINAL ACCESSORY, all of which Exit by the Jugular Foramen, of 

 Foramen Lacerum Posterius. 



gth NERVE, Glossopharyngeal. 

 (See ante, page 132.) 



Origin. 



A Gray nucleus in 

 floor of 4th Vent. 



and 

 medulla oblong. 



olivary body. 



gth Nerve 



Glosso- 

 pharyngeal. 



Functions, Motion, Sensation, Special Sense, 

 Petrosal. 



Tympanic. 

 (Jacobson's N.) 



ting Brs. to ( Carotid p lexus> 



Distributing f Fenestra ovalis. 

 Brs. to 1 Fenestra rotunda. 



vEustachian tube. 

 Carotid Branches. 



Pharyngeal Brs. to Pharyngeal Plexus. 

 Muscular Brs. to muscles of pharynx. 

 Tonsillar Brs.\.o Tonsillar Plexus. 

 Lingual Brs. to post. l /$ of tongue, giving taste 

 thereto. 



loth NERVE, Pneumogastric, or Vagus. 

 (See ante, page 132.) 



Functions, { Sensation, 

 I Motion. 



Auricular (Arnold's Nerve). 

 Pharyngeal. 



Recurrent or Inf. Laryngeal 

 Cervical Cardiac. 

 Thoracic Cardiac. 

 Ant. Pulmonary. 

 Post. Pulmonary. 

 Gastric. Intestinal. \ 



Hepatic. Renal. Splenic, i 



Probably comes 

 from the Spinal 

 Accessory, and 

 supplies all the 



laryngeal 

 muscles except 

 crico-thyroid. 



Terminal Brs. 



Gives sensation to external ear and larynx, motion to other parts, also vaso-motorial, 

 inhibitory, trophic and secretory influences. A nerve of deglutition, phonation, respU 

 ration, circulation, and digestion. The Auriculo-Laryngo-Pharyngo-CEsophago- 

 Tracheo-Pulmono-Cardio-Gastro-Hepatic-Intestinal-Renal-Splenic Nerve. 



nth NERVE, Spinal Accessory. 



(See ante, page 132.) 

 Origin. 



The floor of 4th 

 Ventricle, and 

 gray horn in 

 cord, down to 

 6th Cervical N. 



nth Nerve 



Function, Motion. 



Branch to Vagus, ganglion of root. 



Internal, anastomosing with Vagus, is probably 

 the Recurrent Laryngeal Br. of the latter nerve. 



External, or Muscular, to 



f Sterno-mastoid. 



l-Trapeziuf. 

 A motor nerve to the muscles named, also probably to the laryngeal also. 



