THE SYMPATHETIC SYSTEM 





OPHTHALMIC G. 

 .-'OPTIC 



TVPlLlMCf NUCLEUS 



nu 



TUB. 



FIG. 26. Vegetative system of the 3rd nerve. Oculo motor. 



This diagram shows the vegetative innervatSon of the eye by means of the cranial system annexed 

 to the III cranial nerve. This explains the phenomenon of Wernicke which is pathognomonic of 

 hemianopsia due to a lesion of the outer fibres. 



A ray of light striking the blind half of the eye will not give rise to a motor reflex of the pupil, in 

 this differing from a cortical hemianopsia. 



19 



