Fig. 8.

Results of the regression analysis with alpha power metric within the experimental NFB group (no significant clusters were found within the Sham group). Significant clusters that negatively correlated with alpha power metric are labeled. NOTE: due to the way the alpha power metric is defined (change in alpha power per session averaged over all NFB sessions) for the alpha-down NFB protocol, a successful NFB performer with an overall lower average alpha amplitude would correspond to a lower alpha power metric (decrease in average alpha power). Hence these clusters positively correlate with the participants’ NFB performance. The colors represent the T-values of the voxels for the given contrast, as shown in the color bars. Abbreviations: STG - Superior Temporal Gyrus, dmPFC - Dorsomedial Prefrontal Cortex, TPJ - Temporo-Parietal Junction.