Fig. 8.

Grand average of the fronto-lateral negativity observed over FC1/FC2 (depending on response side) after Laplacian computation, for errors (blue), partial errors (green) and correct (red) trials. This lateral activity is present for the three categories of trials, and neither its amplitude nor its latency differs across the three trial types. This activity is likely a follow-up of the negativity observed above the primary motor cortices contralateral to the response, just before EMG onset (see, Burle et al., 2004 for an overview).