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The tracings show a sample 2 s, eyes closed, resting EEG displayed against average reference. In the lower part, the assignment of the same EEG to four microstate class topographies is shown. The black areas indicate the assignment of the momentary EEG topography to the microstate topography shown on the right. The height of the area indicates the amplitude of the momentary EEG field (global field power). Continuous time periods assigned to a single topography can clearly be seen.
