Figure 1

Experimental design. (a) Combined TMS-tACS approach: the TMS coil is placed over the target tACS electrode on the M1 area. The reference tACS electrode is placed over the ipsilateral shoulder. The subject’s task is to observe either a steady hand or a pinch-grip action. (b) Top view of the design: the actor’s body is hidden by white curtains which are placed to the right of the subject so that the subject observes only the hand movement. (c) EMG montage: g–AgCl adhesive electrodes placed on the belly of the right FDI and ADM muscles.