THE CRANIAL NERVES 



643 



is based upon function rather than upon structure, and implies that 

 these components are arranged in accordance with their terminations. 

 Thus, the classification of these nerves should be based upon the 



Out edge of cerebellar peduncle 

 Superior cerebellar peduncle 



Pineal body 



Collicttliu superior l , 

 Colliculu, inferior \ f cor 



Mesial geniculate body 



- ""* 



Jjateral geniculate body 



4th nerve 

 5th nerve 



Funiculus gracilis 

 funiculu 



Uh ventricle 



FIG. 318. VIEW FROM DORSAL ASPECT or UPPER PART OF THE SPINAL CORD, MEDULLA 

 OBLONGATA, PONS, FOURTH VENTRICLE, MID-BRAIN, THALAMUS, ETC., DISSECTED in situ. 

 (J. Symington.) 



type of organ with which they are united peripherally or upon the 



type of center in which they arise or terminate. 1 Thus, it happens 



that a certain cranial nerve may embrace fibers from two different 



1 Herrick, Wood's Reference Handbook of the Med. Sciences, iii, 1914, 321. 



