(a) Motor-visual
Volume	Mean	Max	x	y	z	Structure	Approx. BA
M > V
1681	3.3	5.4	−52	−33	34	L PoCS/SMG	40/2
784	2.6	3.4	−47	−56	−5	L ITS/MTG	37/19
V > M
2832	−2.8	−4.3	−53	−8	1	L STG	22
		−3.5	−45	7	−11	L STG	38
1220	−2.7	−3.9	−44	−31	2	L STS	22
1169	−2.7	−4.2	49	10	−10	R STG	38/22

(b) Motor–abstract
Volume	Mean	Max	x	y	z	Structure	Approx. BA
M > A
1235	2.9	3.9	−57	−32	32	L PoCS/SMG	40/2
1005	2.9	4.1	−49	−55	−1	L ITS/MTG	37/19
A > M
42 616	−3.0	−5.6	−53	−1	−1	L STG	22
		−4.9	−56	−26	7	L STG	22
		−4.3	−45	25	3	L IFG	47/45
		−3.6	−39	−3	−28	L ITG	21/20
		−3.6	−33	−34	19	L Insula
		−3.3	−54	10	31	L IFG	44/45
		−3.1	−57	−61	18	L MTG	21
19 120	−2.7	−4.3	−8	8	27	L CG	24
		−4.2	−6	7	63	L SMA	6
		−3.7	−6	−20	58	L SMA	6
		−3.6	−5	−18	28	L CG	23
12 630	−2.8	−5.0	49	10	−9	R STG	38/22
		−4.3	58	−19	0	R STG	21/22
12 390	−2.6	−3.7	39	−4	33	R prCG	6
7750	−2.6	−3.6	18	−92	11	R Cuneus	17/18
4659	−2.7	−3.9	−47	−12	53	L PrCG	4/6
3519	−2.7	−4.6	23	21	−5	R Insula
1418	−2.6	−3.4	−17	−52	5	L LG	17/18
810	−2.6	−3.1	−12	−92	26	L Cuneus	17/18

(c) Visual–abstract
Volume	Mean	Max	x	y	z	Structure	Approx. BA
V > A
813	2.7	3.3	−34	−78	30	L SOG	19
2068a	2.7	3.6	47	−55	28	R AG	39
A > V
20 525	−2.9	−4.7	−51	19	13	L IFG	44/45
		−4.5	−51	−19	7	L STG	22
		−4.2	−43	10	−21	L MTG	38/21
1865	−2.7	−3.8	−8	−1	61	L SMA	6
1290	−2.6	−3.5	46	−11	−9	R STS	21/22
1042	−2.7	−3.5	13	12	48	R SMA	6
988	−2.7	−3.6	33	−53	−8	R FG	37
982	−2.7	−3.6	32	−9	56	R SFG	6
967	−2.5	−2.9	17	−72	2	R LG	17/18
928	−2.5	−3.2	−25	18	5	L Insula

(d) Areas correlated with hand ratings
Volume	Mean	Max	x	y	z	Structure	Approx. BA
6421	2.6	3.4	−11	−90	20	L Cuneus	18
		3.2	14	−82	31	R Cuneus	18
2479	2.7	4.2	−13	5	61	L PMd/Pre-SMA	6
		3.0	−17	38	45	L SFG	9
1579	2.6	3.0	−50	−41	52	L PoCG	2
		3.0	−44	−32	45	L PoCG	2/3
1249	2.6	3.7	54	−8	−6	R STG	22
1227	2.8	3.6	−20	−55	−6	L LG	18
1216	2.8	3.8	−19	2	−5	L Putamen
1155	2.9	4.4	31	−28	−12	L PHG	36
1095	2.6	3.4	46	−51	17	R MTG	39
1008	2.7	3.3	19	−56	−7	R LG	18
999	2.6	3.3	12	−55	58	R Precuneus	7
943	2.6	3.5	−32	15	41	L MFG	8
940	2.5	3.2	9	0	53	R SMA	6
		3.0	−4	−6	62	L SMA	6
930	2.6	3.3	−46	−65	29	L AG	39

Note: ITS = inferior temporal sulcus, CG = cingulate gyrus, LG = lingual gyrus, PHG = Parahippocampal gyrus.

Approximate BAs are also indicated when appropriate.

^aCluster significant only in the analysis without the RT covariate in the analysis.