We recorded high-resolution (24 bit) EEG signals with 64-channels (eego mylab, ANT Neuro, the Netherlands) at a sampling rate of 2 kHz. Vertical electrooculography was also recorded for removal of eye movement components. Bipolar EMG of the first dorsal interosseous (FDI) muscle was recorded from the hand that performed the repetitive movement tasks. Individual positions of the EEG electrodes and fiducial markers were acquired by a 3-D optical digitization system (EEG Pinpoint, Localite, Germany) before EEG recordings. Data were recorded during the 5-min resting period and the subsequent repetitive movement tasks (as mentioned in Movement tasks).
