972 



NEUROLOGY 



dilator impulses to the submaxillary and sublingual glands. Other preganglionic 

 fibers of the facial nerve pass via the great superficial petrosal nerve to the spheno- 

 palatine ganglion where they form synapses with neurons whose postganglionic 

 fibers are distributed with the superior maxillary nerve as vasodilator and secretory 

 fibers to the mucous membrane of the nose, soft palate, tonsils, uvula, roof of the 

 mouth, upper lips and gums, parotid and orbital glands. 



There are supposed to be a few sympathetic afferent fibers connected with the 

 facial nerve, whose cell bodies lie in the geniculate ganglion, but very little is known 

 about them. 



Midbrain 



Sympathetic 

 i III efferent fibers , 



Long ciliary nerve to ) 

 Dilator pupillce I 



Medulla 



I. C. 



Short ciliary nerve to ciliary muscle 

 Ciliary ganglion 





-Carotid plexus 

 --Postganglionic fibers 



-Superior cervical ganglion 



Short ciliary nerve to 

 Sphincter pupillce 



I. Thoracic ganglion 



Sympathetic efferent (preganglionic) fibers 

 FIG. 840. Sympathetic connections of the ciliary and superior cervical ganglia. 



The Sympathetic Afferent Fibers of the Glossopharyngeal Nerve are supposed to arise 

 either in the dorsal nucleus (nucleus ala cinerea) or in a distinct nucleus, the inferior 

 salivatory nucleus, situated near the dorsal nucleus. These preganglionic fibers 

 pass into the tympanic branch of the glossopharyngeal and then with the small 

 superficial petrosal nerve to the otic ganglion. Postganglionic fibers, vasodilator 

 and secretory fibers, are distributed to the parotid gland, to the mucous membrane 

 and its glands on the tongue, the floor of the mouth, and the lower gums. 



Sympathetic Afferent Fibers, whose cells of origin lie in the superior or inferior 

 ganglion of the trunk, are supposed to terminate in the dorsal nucleus. Very little 

 is known of the peripheral distribution of these fibers. 



The Sympathetic Efferent Fibers of the Vagus Nerve are supposed to arise in the 

 dorsal nucleus (nucleus ala cinerea). These preganglionic fibers are all supposed to 

 end in sympathetic ganglia situated in or near the organs supplied by the vagus sym- 



