tDCS protocol
The stimulation was administered through a battery-driven constant current stimulator developed by Soterix Medical, America. The stimulation was induced through a saline-soaked pair of surface sponge electrodes. Both anodal and cathodal electrodes were 5 cm × 7 cm in size. To stimulate the rTPJ, the anodal or cathodal electrode was placed between CP6 and C6 according to the international 10–20 EEG system(