Fig. 2

Electrode positions of the 48-channel high resolution EEG recordings. 48 electrodes were placed over the sensorimotor cortex according to a 10–6.7 system with inter-electrode distances of 23 mm in mediolateral and anterior-posterior direction. Electrode positions C3, Cz and C4 are consistent with the international 10–20 system. The central 24 Laplace channels are outlined by solid circles. Electrode positions adjacent to C3 and C4 were annotated according to their use in this paper. In addition, the area of the TMS stimulation grid is overlaid as a blue rectangle