Grand average of the movement- and event-related potentials waveforms.

<p>a) MRCP waveforms (response-related activity) over the prefrontal lobe (Fp2) and the sensorimotor cortex (Cz). Time zero represents the response onset. Vertical green lines represent the median time of stimulus onset in the two groups. b) ERP waveforms (stimulus-related activity) over the prefrontal lobe (Fp2) and the sensorimotor cortex for both Go (CPz) and No-go (Cz) stimuli. Time zero represents the stimulus onset. Vertical blue lines represent the median time of response onset in the two groups.