p. K. ANOKHIN 



193 



in the evening in response to the same bell in the saiiw chamber the animal 

 shows a pronounced defensive reaction. 



In this experiment the difference in the reactions clearly does not depend 

 on the conditioned stimulus which has retained only the uoii-spccijic 

 trigger action because both reactions emerge only in response to the action 



^^ 



J9e<S^ 



J¥^ 



Fig. 2 



A. EEG of the dynamic pattern of 'Bell-Light-Siren'. The regular light ( + ) is suddenly 

 replaced by a bell, but a desynchronization corresponding to the application of light at this 

 place is evident just the same. 



B. Application of all the stimuli of the dynamic pattern ( j ) is discontinued. Further develop- 

 ment of cerebral activity in total conformity with the structure of the pattern can be seen. 

 Complete desynchronization can be seen in place of the absent light (+). 



of the bell, whereas in the intervals between the conditioned stimuli the 

 animal sits quietly. 



Nor are the conditions of the experiment as a whole a differentiating 

 factor since they are the same in both experiments and only the tunc oj 

 day, as one of the components of the conditions of the experiment, is the 

 determining factor. 



If we take into consideration the fact that the time of day becomes an 



