Source analyses of the first negative component N1 (80–90 ms) in controls and BR participants.

Each sLORETA brain source was obtained from the within-group comparison of painless control condition (corresponding to a virtual zero condition of somatosensory stimulation) with Under Threshold, Threshold or Over Threshold conditions. Cortical activities in the above-mentioned contrasts were all significant, and their main generators were located in the postcentral gyrus (control group – Under Threshold condition, and BR group – all intensities) and in the ventral portion of anterior cingulate cortex (control group – Threshold and Over Threshold conditions).BA = Brodmann Area; MNI coords = Montreal Neurological Institute coordinates.