Determination of resting motor threshold (RMT): The RMT will be defined iteratively as previously described over the right M1 prior to each treatment session. Within M1 the position which elicits the highest MEP-Amplitude in the left first dorsal interosseus muscle (FDI) with 80% or higher stimulator output will be maintained and stimulation intensity will be reduced first in 5% intervals until less than 5 consecutive MEPs with amplitude greater 50µV in 10 stimulation trials are obtained. Stimulation intensity will then be set up in 5% intervals until 5 consecutive MEPs with amplitude greater 50µV in 10 stimulation trials are obtained. The intensity at this point is used as RMT.