Table 3.

Exploratory tDCS effects on RSNs: significant clusters for the contrast real tDCS > baseline1

Contrast/network	Brain area	Brodmann's area	Number of voxels	MNI coordinates
				x	y	z
Real tDCS > baseline1
RSNc1/default mode	L superior frontal gyrus	8	392	−24	30	44
	Posterior cingulate gyrus	23	370	0	−54	21
	L middle temporal gyrus	21	337	−62	−24	−14
	R middle temporal gyrus	21	289	68	−14	−14
	L medial frontal gyrus/anterior cingulate	10/32	201	−6	56	−10
	L parahippocampal gyrus	35	137	−20	−26	−14
RSNc2/Left frontal-parietal	R precuneus	7	271	24	−62	54
	L inferior frontal gyrus	10	219	−42	42	8
	L middle frontal gyrus	8	214	−22	28	38
	R posterior cingulate	31	130	16	−22	40
	L lingual gyrus	19	110	−20	−70	4
	L inferior parietal lobule	40	97	−60	−34	28
	R superior parietal lobule	7	67	34	−60	64
RSNc4/self-referential	L precentral/postcentral	3/4
	Gyrus/superior parietal lobule	5/7	768	−16	−20	72
	L superior temporal gyrus	22	695	−68	−14	2
	L superior temporal gyrus	38	512	−26	16	−40
	L lingual gyrus	19	297	−28	−64	2
	R parahippocampal gyrus	30	169	28	−54	4
	L precuneus/supramarginal gyrus	7/40	133	−20	−50	38
	L cerebellum culmen		95	−34	−60	−22
	L insula	13	45	−36	−28	22
	R middle temporal gyrus	21	35	70	−12	−10
	L subgenual gyrus	25	30	−14	12	−24

Resting-state network contrast (RSNc) 1 corresponds to the contrast on the DMN, RSNc 2 to the contrast on the left FPN, RSNc 3 to the contrast on the right FPN, and RSNc 4 corresponds to the contrast of the self-referential network. Results are based on a whole-brain dual-regression approach and presented uncorrected with a p < 0.001 (cluster size, >20 voxels).