B. Quantification of individual (open circles) and average (grey bars) AMPA/NMDA ratios of neurons from inactive control, GSK3α or GSK3β inhibitor-treated slices, where AMPAR-mediated current is taken as the peak response at −60 mV, and NMDAR-mediated current is measured at +40 mV at a latency of 60 ms following stimulation. Error bars represent SEM. Statistical significance was calculated according to the Mann-Whitney U test. C. Cumulative frequency distribution of the AMPA/NMDA ratios plotted in B. Statistical significance was calculated using the Kolmogorov-Smirnov test. 