Descriptive statistics of stimulation-induced changes on neural level. (A) Grand average time course of MI-induced ERD% for the hand contralateral to the cathode (cC hand) and the hand contralateral to the anode (cA hand) separately for sham (left half) and real (right half) stimulation. For the sake of transparency contralateral ERD% and ipsilateral ERD% (top half) before calculating the ERD% lateralization (difference between contra- and ipsilateral ERD%, bottom half) used for the main analysis are also presented in this figure. Activity extracted above the contralateral and ipsilateral hemisphere, with respect to the hand used, is visualized in blue and red respectively. Activity was extracted from the scalp sites C3 and C4. The MI interval started at 0 s and ended at 5 s, however, as ERD% was derived using a moving average, the two grey shaded areas mark the time windows of begin and end of the MI interval. The two vertical lines indicate the time interval used for statistical analysis (0.5 s to 4.5 s) and the horizontal dashed line represents the zero line. For the ERD% lateralization the mean with standard error of the mean is illustrated. (B) MI-related activity extracted above the contralateral and ipsilateral hemisphere between 0.5 s to 4.5 s. Error bars represent one standard error.