The Brain. 



231 



of one side is due to injury of the opposite hemisphere of 

 the cerebrum. 



Location of Brain Functions. Much has been learned in 

 late years as to the location of special functions in the brain. 



CENTRAL FISSURE 



MOTOR AREA 



FISSURE OF SILVIUS 



Fig. 93. Location of Brain Functions. 



Some of the motor and sensory centers are shown in 

 Fig. 93. 



Connection of Brain Centers. These different brain 

 centers are connected by nerve fibers, and through these 

 connecting fibers we produce various actions as a result of 

 sensations. For instance (see Fig. 94), nerve impulses come 

 through the nerve of hearing to the auditory center, and we 

 have hearing ; this center is connected with the speech 

 center ; and, as a result, we send out nerve currents to the 



