THE NINTH NERVE, OR GLOSSO-PHARYNGEAL 



557 



The fibers of the spinal origin of the nerve pass from these cells through 

 the lateral column to the surface of the cord. The fibers from the median part 

 pass in a ventral and lateral direction through the reticular formation, th?n 

 ventral to or through the gelatinous substance and strand of fibers connected 

 with the fifth nerve, to the surface of the bulb. 



The fibers from the nucleus ambiguus join the combined nerve, chiefly 

 the vagus and glosso-pharyngeal. 



The bundles of fibers of the fasciculus solitarius start in the lateral gray 



CORPORA QUADRIGEMINA 



FIG. 389. The Nuclei of Origin and Central Connections of the Auditory and Vestibular Nerve. 



(Cunningham.) 



matter of the cervical cord and higher in the reticular formation of the bulb, 

 run longitudinally forward, to pass into the roots of the ninth nerve. It is 

 composed of sensory fibers, chiefly of the glosso-pharyngeal. 



The glosso-pharyngeal nerve gives filaments through its tympanic branch 

 (Jacobson's nerve) , to the fenestra ovalis and fenestra rotunda, and the Eu- 

 stachian tube; also to the carotid plexus, and through the petrosal nerve, to 



