Figure 3.
Power effects in the log gamma-band (28–32 Hz). a, Time-frequency plot of the relative power difference (dB) between pain and no-pain trials averaged across electrodes Fz, F1, FC1, and FCz. Solid outline indicates the prestimulus effect identified by permutation testing (tmax = 3.67, p < 0.05, FDR corrected). Dotted outline indicates the data region used as significant regression predictor in single-trial analysis (electrode F1, b = −0.93, p < 0.045). b, Topographies show relative power differences (dB) between pain and no-pain trials in the prestimulus time range (top) and poststimulus time range (bottom). *Electrodes showing significant effects.