728 ARTHUR J. RIOPELLE 



lobes are involved, for removal of these areas produces deficits of the sort 

 produced here. Whether damage to other parts of the brain occurred, needs 

 further testing. 



One cannot help but be reminded that Clemente and Hoist (1954) ob- 

 served that lesions occurring after a long latent period showed a predilection 

 for the white matter. We strongly believe that when delivered in a short time, 

 2,000 r of gamma radiation produces severe changes in the functioning of 

 the central nervous system, changes which affect the cognitive and inte- 

 grative perceptual spheres of behavior. 



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