W. R. ADEY 



583 



AUTOCORRELATIONS 



SAMPLING RATE 20/SEC. 



CAT 7 - TRIAL 4 - ENTQRHINJAL RECORD 



1-5 SECS 



0-5 



-0-5- 



0-5- 



- 0-5h 



SAMPLING RATE 40/SEC. 



CAT 7 - TRIAL 4 - ENTORHINAL RECORD 



1-5 SECS 



SAMPLING RATE 40/SEC. 

 GAT 7 - TRIAL 4 - DORSAL HIPPOCAMPAL RECORD 



Fig. 4 



Auto-correlation functions prepared with an IBM-709 electronic computer, indicating 

 inherently sinusoidal nature of 6 cycles/sec. bursts of hippocampal and entorhinal activity 

 during approach performance. 



