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Effects of psilocybin treatment and ketanserin pretreatment on α power values in three parieto-occipital ROIs. A, Time course for α power values (8–12 Hz) as a function of placebo + placebo (black), placebo + psilocybin (red), ketanserin + placebo (blue), and ketanserin + psilocybin (green). B, Time course for the difference in power values between placebo + psilocybin and placebo + placebo for all frequencies (4–52 Hz).
