Figure 5.

The R-cluster data (A) pooled across electrodes FCz, FC2, F2, and FC4 with topographic plots for nonspeedup (non) and postspeedup (post) trials in the congruent (con) and incongruent (ico) condition separate for the first and the second peak at the bottom. The congruent condition is shown in blue, the incongruent condition in red. The nonspeedup condition is shown in lighter coloring than the postspeedup condition. Time point 0 denotes the time point of the flanker stimulus onset. Time windows used for analyses are highlighted in gray. Topographic plots show the distribution of the potentials at the peak of the respective component. Positive potentials are shown in red, negative potentials are shown in blue, scaling is given in μV/m². The graphs in (B) shows the interaction of Congruency*PostSpeedup separate for both peaks. The sLORETA plots in (C) show BA4 being differentially modulated in the time window of the peaks in the incongruent condition (postspeedup > nonspeedup). For the sLORETA plots, heightened activation is shown in yellow, reduced activation is shown in blue, scaling corresponds to t-values.