Table 1.

fMRI Activations

Region	Max Z Statistic	Volume (mm3)	Coordinates
			x	y	z
Negative correlations between boxcar-related BOLD signal change and GABA
Left primary sensorimotor cortex	5.11	576	−40	−30	46
Positive correlation between learning-related BOLD signal change and tDCS-induced GABA change
Left primary motor cortex	3.45	1015	−42	−24	64

Negative correlations between the boxcar-related BOLD signal change and GABA refer to areas where subjects who had a higher resting GABA showed smaller BOLD signal change. Negative correlations between the learning-related BOLD signal change and tDCS-induced GABA change refer to areas in which subjects who showed a greater decrease in GABA in response to tDCS also had a greater learning-related BOLD signal change.