138 THE NEKVnrs SYSTEM AND ITS ( < ).\SKIi\ ATION 



objects and situations, which arise in our dreams favor the 

 belief of Prince. 



\\ e must now attempt to connect the view that the 

 cortical reactions are essentially reflexes, though often 

 delayed and modified by many factor-, with modern 

 doctrines of localization. A brief discussion of the "motor 

 areas" will be in order. It was discovered in INTO by 

 (le.man investigators that electric stimulation applied 

 to the cerebral cortex of the doii at certain, definite places 



22. The luiiii.-m cerebrum is sketched from the left side. 

 The crosses .-ire -priukled on the area from which the miiM'l"s of the 

 rifiht half of the body appear to he -invented. This area extend- ..lit 

 of sight over the top "'' ''"' '"'ain and dips into the fissure between 

 the two hemispheres. 



calls into play the muscles of the body in a manner which 

 can be predicted. The muscles thrown into contraction 

 are for the most part on the opposite side of the body. 

 In the ape motor areas exist in the same sense: excitation 

 of the cortical neurons at certain spots leads regularly to 

 movements made by corresponding groups of muscles. 

 It is known that the same representation of the muscular 

 system in mo-aic form can be demonstrated on the surface 

 of the cerebrum in man ( Fii'. 22). These areas are evi- 



