Fig. 2

Comparison of the averaged ERSPs (A, B) and laterality indices of ASSRs (C) between different click train frequencies at 20 − 83.3 Hz. A Temporal changes in mean ERSPs across the five monkeys in response to 20, 40, 58.8, and 83.3 Hz click trains. Colored bars indicate SEM at each time point. B Comparison of mean ERSPs during 300 ms from 150 to 450 ms after stimulus onset for five monkeys in response to 20, 40, 58.8, and 83.3 Hz click trains at each electrode. C Comparison of mean laterality indices based on powers. Ant (blue), (F4-F3)/(F4 + F3); Mid (orange), (C4-C3)/(C4 + C3); Post (gray), (P4-P3)/(P4 + P3). An asterisk and double asterisks indicate significant differences (*p < 0.05, **p < 0.01, Tukey HSD test). Error bars represent SEMs