Fig. 3.

Phase accuracy tested in the triggered but non-stimulated rs-EEG. a Mean C3-centered Laplace-transformed EEG signal for negative peak (blue) and positive peak (red) across all real-time triggered but non-stimulated trials of all subjects (n = 12). Dashed vertical line represents time point of the trigger. b Binned distribution (7.5° per bin, 2% frequency steps) of actual phase angle at the time of trigger of non-stimulated trials as determined by Hilbert transformation of the band-pass filtered segment of data before and after each marker. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)