H. ENGER ROSVOLD AND MORTIMER MISHKIN 



569 



n 



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o)~ 



«. 



b) 



I I I I I I I I I I I ' I I I I I I I T I I I I I 1 I I ' r I I M I ' I ' I I » 

 M, 81 Bi 84 



[M 



H n 





\s 



, I I I I I I r I I J I t I I I I r I I I I I I I I I I I 'I I I I ( I I I I ' I I I I I I I I ' I I I I I I I '' t I I r ■ I 



Bj 8, M, PM, M. 



m Mini 



iUU U!l 



U 



n 



' ■m'rrT 



M, 



rri > I T 1 I I I 1 1 I I T I r T-rm ri j- 

 PM, M, 



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6. 



9, 



Bt 



Fig. 2 

 Kymographic records of parts of some representative experiments in dogs before and after 

 successive operations. 



Each record comprises from top to bottom: bftmg the right foreleg and putting it on the 

 food-tray; conditioned stinmli; the moment of food presentation; time (5 sec); symbols of 

 stimuli: M,, Metronome, Bj, Bell, B.^, differential Bell, PM,, Propeller } Metronome (inhibi- 

 tory compound); a, fragment of the last experiment before first frontal ablation; b, fragment 

 of the first experiment after first frontal ablation ; c, fragment of an experiment ih months 

 after first frontal ablation; d, fragment of an experiment after parietal ablation; e, fragment of 

 an experiment shortly after second frontal ablation; f fragment of an experiment a month 

 after second frontal ablation (After Brutkowski et al., 1956). 



