References
(a) experimental procedure and design of the study; (b) fMRI data analyses procedure; (c) anodal and cathodal tDCS configurations.(a) Correlation between our ICA maps and the ICA maps inside of CONN; (b) The brain regions of the FPN (green) and DAN (pink).Identified Frontoparietal network (a) and Dorsal Attention network (b) and the clusters that showed significant differences from between-group comparison results.(a) Correlation between the DAN-right parietal operculum FC change and placebo analgesia in the all three tDCS groups in the comparison between post day 3 and pre day 1 (main effect of the stimulation; pre tDCS day 1 minus post tDCS day 3); (b) correlation between the DAN-right parietal operculum FC change (between post day 3 and pre day 1) and the corresponding placebo analgesia in anodal, cathodal, and sham groups separately; (c) correlation between the DAN-right parietal operculum FC change and placebo analgesia in the three tDCS groups in post day 3.Statistical analysis on the DAN and FPN FC differences (pre-tDCS on dayl vs post-tDCS on day 3) across three groups.“Pre day 1″ indicates pre resting state in day 1 before the application of the tDCS; “Post day 3″ indicates the resting state after the tDCS on day 3 (end of the treatment). Results were significant at cluster P