Table 3.

Regions, peak coordinates, cluster sizes (k), and t values of the significantly activated clusters (P < 0.05, FWE corrected) from the main effect of operation

	Peak coordinates
Cluster	x	y	z	k	t
Multiplication > subtraction
R occipital lobe (V1/inferior occipital G/calcarine G)	18	−96	4	243	5.80
L occipital lobe (V1/middle occipital G)	−22	−96	2	128	5.78
Subtraction > multiplication
/	/	/	/	/	/

Only clusters of 20 voxels or more are reported.

Abbreviations: L = left hemisphere; R = right hemisphere; G = gyrus; V1 = primary visual cortex.