Table 3.

Regions Implicated in the SOA by Validity Interaction

							SOA
Region	Side	BAs	X	Y	Z	Volume (mL)	200 msec	400 msec	700 msec
Frontal
Pre-SMA/SMA/anterior cingulate	M	6/8/24/32	−3	3	53	4.652	INV>VAL	INV<VAL	n.s.
Middle frontal and precentral gyrus	L	6	−18	−12	58	3.206	INV>VAL	INV<VAL	n.s.
Parietal and occipital
Posterior parietal cortex	L	2/3/4/5/7/40	−28	−38	58	4.514	INV>VAL	INV<VAL	n.s.
Precuneus and cuneus	R	7/19	11	−66	45	3.374	INV>VAL	INV<VAL	n.s.
	L	5/7/18/19/31	−14	−63	40	13.972	INV>VAL	INV<VAL	n.s.

Side refers to the hemisphere showing activation (M, midline; L, left; R, right hemisphere). The Brodmann area (BA), the center of mass in Talairach coordinates (X, Y, and Z), and volume are specified for each area of activation.

SOA, stimulus onset asynchrony; SMA, supplementary motor area; INV, invalid; VAL, valid; n.s., not significant.