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On PSG, EOG showing conjugate sharp vertical eye movements during stage W with frequency of 2.8 Hz, mean amplitude 60 μV, and mean duration 0.36 s. Frequency is faster than eye blinks (0.5–2 Hz). The eye movements are transmitted to the F3-M2 and F4-M1 channels, represented by high amplitude waves. EOG = electrooculogram, PSG = polysomnography.
