Time course of averaged ERBP values in six time windows (1, −100 to 0 msec; 2, 50–150 msec; 3, 150–250 msec; 4, 250–350 msec; 5, 350–450 msec; and 6, 450–550 msec) for three emotion categories and two gamma frequency ranges (higher and lower gamma). *Statistically significant differences between emotion categories that were assessed by ANOVA with α = 0.005. Error bars represent 1 SEM (n = 12).