Theta Rhythm: A Temporal Correlate of Memory Storage Processes in the Rat

Science  07 Jan 1972:
Vol. 175, Issue 4017, pp. 87-89
DOI: 10.1126/science.175.4017.87


We examined the amount of theta rhythm (4 to 9 hertz) in cortical electroencephalograms of rats for 30 minutes after training in one-trial tasks. Some animals received electroconvulsive shock after training. The amount of theta in the electroencephalogram after training was positively correlated with the degree of subsequent retention of a footshock, whether animals had received electroconvulsive shock or not.