THE MOTOR AREAS 



639 



Moreover, it is found in these stimulation experiments on man that, just 

 as in the manlike apes, the localization is very sharp, that the movements 

 indeed are confined to single groups of muscles, and that between the excitable 

 points are regions which are inexcitable. 



FIG. 289. Diagram of the external surface of the left cerebral hemisphere of man, after Ecker. 



Tempo f' 

 FIG. 290. Diagram of the internal surface of the right cerebral hemisphere of man, after Ecker. 



