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The average of stimulus‐induced activity across trials (trial‐to‐trial mean, TTM) during the peak period (4–5 s) in wakefulness, propofol‐induced sedation and deep anesthesia. Group‐level z‐maps (one sample t tests against zero) were corrected at α < 0.05 at the cluster level. (a) Results without global signal regression (no‐GSR). (b) Results with GSR [Color figure can be viewed at http://wileyonlinelibrary.com]
