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Summary of the experimental time courses of oscillatory time-frequency parameters (a–f) in early visual cortex for both tiagabine and placebo sessions. Early gamma was defined in the range 30–150 Hz, 0.05–0.1 s, late gamma was defined in the range 30–80 Hz, 0.3–1 s, and alpha in the range 8–15 Hz, 0.3–1 s. No oscillatory parameters displayed an interaction effect indicative of a drug effect.
