Fig. 1.

A) Procedures for the visuomotor condition. At the beginning of each trial a fixation cross appeared on the screen for 2 s. After the disappearance of the cross, participants pressed a button and received a visual feedback (a 6° diameter white circle) 300 ms after the button press. In the motor condition, when the cross disappeared, participants had to press a button but received no visual feedback. In the visual condition, no action was required but rather a visual stimulus appeared in the center of the screen. B) Electrodes location in the EMG control experiment.