688 



PHYSIOLOGY OF DIGESTION AND SECRETION. 



glands arises from the brain in the facial nerve and passes out in the 

 chorda tympani branch (Fig. 265). This latter nerve, after emerging 

 from the tympanic cavity through the Glaserian fissure, joins the 



Otic 

 Ganglion. 



Sliuill superficial 

 Petrosai nerve 



Glosso-hharynoetU 

 Mue y * 



Ganglion. 

 Fig. 264. Schematic representation of the course of the cerebral fibers to the parotid gland. 



lingual nerve. After running with this nerve for a short distance, 

 the secretory (and vasodilator) nerve fibers destined for the sub- 

 maxillary and sublingual glands branch off and pass to the glands, 



Fig. 265. Schematic representation of the course of the chorda tympani nerve to the 



submaxillary gland. 



following the course of the ducts. Where the chorda tympani fibers 

 leave the lingual there is a small ganglion which has received the 

 name of submaxillary ganglion. The nerve fibers to the glands 



