Table 2.

Regions associated with stronger sustained activation for maintaining specified rules than voluntary rules during delay periods

Region	t value	MNI coordinates
		x	y	z
Middle orbitofrontal cortex	5.97	0	47	−11
Middle frontal gyrus	5.36	−24	35	43
Ventral intraparietal sulcus	6.05	−39	−79	34
Precuneus	4.98	−6	−55	28
Middle cingulated gyrus	4.78	−3	−43	43
Calcarine sulcus	4.86	−6	−55	7

Values are statistics (p < 0.05, FWE corrected) and peak coordinates (separated by ≥8 mm) reported in MNI space (mm). The reverse contrast showed no significant activations.