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. 2011 Jun 1;56(3-4):1059–1071. doi: 10.1016/j.neuroimage.2011.03.008

Fig. 3.

Fig. 3

Induced gamma investigation by ERSP. Grand Average of ERSP for Raw Data—first row and for each method (EEGICk—second row, EEGFSP100—third row and EEGFSγ—fourth row). The left column shows the ERSP calculated for the single trials and then averaged. The middle column shows the ERSP for the averaged trials (i.e. ERSP of the average VEP). The right column shows the ERSP calculated for the regressed single trials and then averaged (note in this case the absence of the regular broad band transient which represents the VEP). The plots are thresholded at a bootstrap significance level of p = 0.01 such that effects below threshold are shown in green for the ERSP. The points after 0 (from 0 to 5 s) correspond to the time when a reversal checkerboard stimulus was presented on the screen (Stimulus—Task), and the points before 0 (from − 5 to 0 s) correspond to the time in which no reversal checkerboard stimulus was present (No-Stimulus—Rest).