Table 2.

Mean percent signal change for each ROI in each condition, sign × operation

	Positive		Negative
	Addition	Subtraction	Addition	Subtraction
L IPL	0.053	0.11	0.144	0.203
R IPL	0.022	0.051	0.064	0.121
L Caudate	0.042	0.045	0.067	0.059
R Caudate	0.008	0.01	0.02	0.037
L AG	−0.003	−0.117	−0.286	−0.062
R AG	0.114	−0.032	−0.125	0.060