2.4.7. Definition of ROIs
After the group-level statistical evaluation of the source power difference between MI1 and MI2 tasks in different TOIs for the TMS condition, regions of interest (ROIs) were defined based on this effect. It was done to reduce the search space in later analyses (power, correlation, and connectivity analyses). ROIs were defined as dipolar point estimates, separately for each frequency band, that showed the maximal power difference effect (points characterized by the maximum modulo value of the t-statistics).