494 



BRAIN MECHANISMS AND LEARNING 



curves of Clir and Myii on discrimination Il-ab depicting initial learning 



through one eye and relearning through the second eye post-operatively. 



Four chiasma-sectioned cats were used to explore the induced gnostic 



capabilities of the 'untrained' hemisphere as tested following post-training 



20r 



o 



o 

 o 



<v 



£ 



3 











Chr 



Sets 



5 

 of 



10 



15 



twenty trials 



20r 



o 

 u 



(V 



£ 



3 











Myn 



Sets 



5 10 15 



of twenty trials 



Fig. 7 

 Performance of Chr and Myn with discrimination Ill-ab. 

 The soHd Hne represents initial training with one eye, while 

 the dashed line represents performances achieved through the 

 second, untrained eye. C/;r illustrates immediate recall through 

 the untrained eye, while Myn gives evidence of considerablc 

 saving in relearning through the untrained eye. 



corpus callosum section. Performance levels as post-operatively tested 

 through both the trained and untrained eyes are given in Table V. Krni 

 and B(7((' may be taken as illustrative cases. Kriii was taught and over- 

 trained on discrimination Ill-ba and V-ba while using the left and right 



