Figure 2.

Event-related potentials upon auditory click stimulation. (A) Mean ± SEM EEG-signal from Cz averaged time-locked to the first click for the Stimulation (red) and Sham conditions (black) in older population. Vertical line indicates timing of the first clicks, whereas thick horizontal black bars mark time points of significant difference between conditions. (B) Mean ± SEM EEG-signal from Cz averaged time-locked to the first click for the Stimulation (green) and Sham conditions (black) in young cohort. Vertical line indicates timing of the first clicks, whereas thick horizontal black lines at the top mark time points of significant difference between conditions. (C) Top schematic illustrates the time points during which trough amplitudes were obtained to determine the relative change shown color-coded as topographical maps of the evoked response with respect to the endogenous SO. Vertical grey line marks time point of the first click (t = 0). White circles indicate channel location with a significant change from baseline after FDR correction.