Table 1.

Suprathreshold activations in the Load 3 > Load 1 contrast, and correlations between load related activity and d′. Significance threshold is at p <0.05 FDR cluster corrected. Abbreviations: frontal eye fields (FEF), middle frontal gyrus (MFG), inferior frontal junction (IFJ), medial superior frontal gyrus (mSFG), supplementary motor area (SMA), pre-supplementary motor area (pre-SMA), superior parietal lobule (SPL), inferior parietal lobule (IPL), intraparietal sulcus (IPS), lateral occipital gyrus (LOG), inferior temporal gyrus (ITG), superior temporal gyrus (STG), sensorimotor cortex (SMC), supramarginal gyrus (SMG), ventromedial prefrontal cortex (vACC) and posterior cingulate cortex (PCC). L, left hemisphere; R, right hemisphere.

Region	t value	Cluster size	MNI Coordinates (mm)
			x	y	z
Load 3 > Load 1: Task Positive Activity
Frontal
L FEF	6.15	139	−24	−1	58
L IFJ	7.63	190	−48	2	31
R FEF	7.87	169	27	−7	52
R MFG	5.38	80	42	35	7
R IFJ	10.20	224	48	5	28
mSFG (pre-SMA)	4.91	49	−3	20	43
Parietal
L SPL	11.22	2437	−18	−64	52
L IPL	9.54		−36	−37	43
L IPS	10.36		−24	−73	31
R SPL	12.87	2714	21	−61	58
R IPL	8.49		48	−31	43
R IPS	11.07		30	−82	31
Temporo-occipital
L LOG/ITG b	11.33		−36	−82	13
R LOG/ITG c	12.72		48	−64	−8
Load 3 > Load 1: Task Negative Activity
Frontal
SMA	4.43	108	−3	−22	46
Parietal
L SMG	6.42	238	−57	−52	43
R SMG	5.71	321	48	−58	28
Precuneus/Cuneus	5.61	345	0	−82	31
PCC	5.56	71	12	−55	31
R SMC	4.38	74	42	−19	64
Negative correlation between load effect and d′ in load-dependent regions
vACC	5.91	77	−6	32	−11
PCCa	3.85	27	3	−52	22

^aCluster at p < 0.001, uncorrected (FDR = 0.253).

^bPart of the L SPL cluster.

^cPart of the R SPL cluster.