The power spectra analysis and EEG connectivity were compared between TAS+ and TAS− participants for each frequency band. The comparisons were performed using the statistical non-parametric mapping (SnPM) methodology supplied by the eLORETA software43. This methodology is based on the Fisher’s permutation test (i.e., a subset of non-parametric statistics, more details could be found in ref. 43). Correction of significance for multiple testing was computed for the comparisons between TAS+ and TAS− groups for each frequency band. The non-parametric randomization procedure, available in the eLORETA program package, was performed for the correction of multiple comparison (i.e., Holmes’ non-parametric correction for multiple comparisons4344). The T-level thresholds were computed by the statistical software implemented in the eLORETA, which correspond to statistically significant thresholds (p < 0.05 and p < 0.01)45. These T-level thresholds and the correspondent p values were provided after applying the correction for multiple comparisons.
