262 



LOCATION OF BRAIN FUNCTIONS. 



In the case of man we infer that there is a similar location, 

 and many cases of accident and disease have helped in this 

 work of locating the functions. But these areas are not 

 sharply denned. 



The " speech center " is in the left hemisphere ; the right 

 eye and ear, which connect with the left brain, are better de- 



CENTRAL FISSUfi 



MOTOR AREA /' 



FISSURE OF SILVIUS 



Fig. 83. Location of Brain Functions. 



veloped than the left, and in general the left hemisphere 

 seems superior (in right-handed persons) to the right. 



It is not so easy to locate the centers of sensation as those 

 for motion. For we can see the resulting motion, but a sen- 

 sation can only be felt by the individual in whom it occurs. 

 Still, some of the sensation centers have been located, and it 



