Trial-by-trial correlations between stimulus-induced force and EEG modulations. Bidimensional plots represent the significant trial-by-trial correlation coefficients (cluster-corrected Spearman’s r) between EEG and force, for all possible pairs of time points, at electrode Cz. The topographies of the main correlation clusters are also plotted. The EEG time series (plotted vertically) and the force time series (plotted horizontally) are shown to assist interpretability of the correlations. Note that the correlation between the EEG positive wave (P130) and the force increase (i2) is slightly lateralized toward the right scalp regions, that is, contralateral to the arm that exerted the force.