Table 1. Activation patterns corresponding to the effects of visual WM load.

Brainregion	Hemisphere		Clustersize		T/F	p	x		y	z
A) Main effect ( F -Test)
Inferior frontal gyrus	L		2772		32.30	<.001	−35		21	−6
	R		1132		29.21	<.001	30		23	0
Orbitofrontal gyrus	R		408		25.39	<.001	36		54	−6
DLPFC	L		2977		8.47	<.001	−48		26	29
	L		46		2.34	.001	−39		35	−18
	L		27		17.09	.008	−26		17	−21
	R		20		18.15	.004	45		21	12
Middle frontal gyrus	L		143		16.58	.012	−44		47	9
Superior frontal gyrus	L		29		16.91	.009	−30		57	0
SMA	L		14751		8.44	<.001	−5		5	50
vmPFC	L		5385		35.47	<.001	−6		54	−17
	R		45		21.14	.001	9		50	26
Middle cingulate gyrus	L		1352		25.26	<.001	−8		−45	36
	L		56		17.20	.008	−5		−27	45
Precuneus	R		108		18.57	.003	8		−59	26
Inferior parietal gyrus	L		16781		68.32	<.001	−42		−41	45
Angular gyrus	L		118		17.06	.008	−47		−63	26
Insula	L		25		2.30	.001	−47		0	14
	R		166		25.00	<.001	39		−15	17
	R		56		18.80	.003	48		−29	20
Inferior temporal gyrus	L		152		21.42	.001	−54		−63	−15
Fusiform gyrus	L		25		16.95	.009	−32		−36	−18
	R		268		23.36	<.001	57		−56	−17
	R		50		19.70	.001	42		−62	−15
Thalamus	R		617		22.46	<.001	12		−6	−2
Putamen	R		411		2.42	.001	21		11	2
Lobule VIIa crus I	L		2077		45.25	<.001	−32		−65	−32
	R		133		2.98	.001	36		−78	−39
Lobule VI	R		5229		44.42	<.001	35		−51	−32
Lobule VIIIa	R		116		25.36	<.001	39		−44	−54
Lobule VIIa crus II	R		172		19.55	.002	38		−63	−51
Substantia nigra	L		69		18.87	.003	−8		−20	−12
B) Parametric effect ( T -Test conjunction)
Precentral gyrus	R	236		4.35		–	30	−3		47
SMA	R	449		4.85		–	5	9		51

A) The F-contrast (F>14.46) resulted from a group-level GLM, testing for general differences between all visual WM conditions, p<.05, FWE-corrected, k>20). B) The T-contrast conjunction (T>3.24) combined the effects of 2-back>1-back ∩ 1-back>0-back ∩ 0-back>fixation, p<.05, MC-corrected, k>125). P-values are only reported if surviving voxel-level FWE correction. DLPFC = dorsolateral prefrontal cortex, SMA = supplementary motor area, vmPFC = ventromedial PFC.