Fig. 5.

Mean beta values and differences, and their corresponding standard errors at the PC-ROI (top row, a–c) and M1-ROI (bottom row, d–f). Left column ($a+d$): mean beta values for HbO of the ipsi- and contralateral hemisphere for the MIR and NOR conditions; middle column ($b+e$): mean beta values for HbR of the ipsi- and contralateral hemisphere for the MIR and NOR condition; right column ($c+f$): mean interhemispheric differences in the MIR and NOR conditions for HbO and HbR (multiplied by $-1$). Note that, in the figures of the right column, values $>0$ indicate activation in the contralateral $>$ ipsilateral hemisphere, and values $<0$ indicate activation ipsilateral $>$ contralateral.