^Jprnix 



Superior olive 



Ala cintTCa 



Nuclei of funiculi gracilis 

 and cuneatus 



n. V motor 

 n. V sensory 

 Chief sensory 

 nucleus V 



Nuc. vestib. VIII 

 n. VII 



Nuc. cochlearis VIII 



Fasciculus solitarius 



Nuc. commissuralis of Cajal 



Nucleus spinalis V 



Fig. 77. A diagram of the human brain stem from above after the re- 

 moval of the cerebral hemisphere, to illustrate the nuclei of the thalamus 

 and some of the chief fiber tracts connected with them. Compare Figs. 71 

 and 45. The fibers of the sensory radiations between the thalamus and the 

 cerebral cortex fall into three groups : somesthetic (sow.) for touch, tempera- 

 ture, and spatial discrimination, auditory (era.), and optic (opt.). Descend- 

 ing cortico-thalamic fibers are shown in connection with the somesthetic 

 radiation only; but such fibers are present in the auditory and optic radia- 

 tions also, ant., Anterior nucleus of thalamus; ep., pineal body (epiphy- 

 sis); c.g.l., corpus geniculatum laterale; c.g.m., corpus geniculatum mediale; 

 col. inf., colliculus inferior; col. sup., colliculus superior; lat., lateral nucleus 

 of thalamus; med., medial nucleus of thalamus; post., posterior nucleus of 

 thalamus; pulv., pulvinar; ventr., ventral nucleus of thalamus. 

 164 



