Fig. 4.

Variations in upper alpha EEG power across three experimental conditions during the rtfMRI-nf training. The maps show differences in average normalized upper alpha EEG power values for the Happy Memories and Rest (H vs R), Count and Rest (C vs R), and Happy Memories and Count (H vs C) conditions for the experimental group (EG). The results are also averaged across three rtfMRI-nf training runs (Run 1, Run 2, Run 3). The (unitless) normalized power was computed as ln(P), where P is EEG signal power for a given channel with Cz reference. The upper alpha EEG band was defined individually for each participant (see text for details).