Fig. 3.

Hue tuning of gamma oscillations. (A) Change in gamma power from the baseline to the stimulus period, normalized for each electrode by subtracting the maximum change across hues, such that the trace for each electrode has a maximum of 0. These traces were subsequently averaged across all electrodes. Individual monkey traces are shown in different colors, as indicated in the plot. Error bars denote the SEM across electrodes. (B) Histogram of peak hue across electrodes in two hue ranges separated by 270° and 90° hues (represented by the dotted black lines in A). (C) Variation in peak frequency, normalized in the same way as in A by subtracting the maximum peak frequency value for each electrode, followed by averaging across electrodes and monkeys.