CENTRAL NERVOUS SYSTEM. 



249 



Fir.. 103.— Rabbit's brain, dorsal view. The 

 areas indicated are those the stimulation of which 

 causes a movement of the parts named (Mann). 



Fig. 10-4. — Rabbit's brain, lateral view. The 

 areas indicated are those the stimulation of which 

 causes a movement of the parts named (Mann). 



Fig. 105.— Lateral view of the left hemisphere of an orang-utan^', showing the motor area about the cen- 

 tral fissure (Beevor and Horsley). 



Kin. loo.— Lateral view of a left human hemisphere, showing the motor areas in man. The schema 

 is based on the observations on the monkey, on pathological records (human), and on direct experiments 

 on man. it is to be remembered that in the buman brain the excitable localities are surrounded bj 

 rather extensive anas nol directly excitable (Dana). 



ration occurs, so that these centres come to be surrounded by parts of the cortex 

 from which no response can be obtained upon direcl stimulation (see Fie;. 105). 



