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Effects of light on alert rat. (A) Blink evoked by stimulation of the supraorbital nerve (SO) in the dark and in a 15.1 × 103 μW/cm2 light. R1 and R2 identify the two components of the trigeminal-evoked blink. (B) Relative OOemg amplitudes of the R1 and R2 components over all days and trials in the dark (solid bars) and light (open bars). (C) Average spontaneous blink rate in the light and dark trials across all days. ***P < 0.001.
