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(A) Twenty-four hours sleep hypnogram, recorded 10 days after the onset of symptoms. St. I, II, III and IV = stage I, II, III and IV non-rapid eye movement. (B) Hypnogram obtained 3 months later. An episode of nocturnal sleep is evident, with increased duration of rapid eye movement sleep. Daytime sleep duration appears to be decreased, but three episodes of sleep can still be observed during the daytime. No further recording of sleep could be performed during follow-up.
