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Changes in mean firing rate and discharge pattern during learning. A, B, No significant variation was found in the mean firing rate or the degree of burst firing in the course of training phase I or II. The abscissa denotes training sessions. Data are mean ± SEM. C, D, Significant variation was detected in neither the variance of Δrate nor Δburst. The numbers representing integer i on the abscissas denote the time period between sessions i and i + 1.
