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Figure 5 : Cumulative histogram of the duration of sleep (in minutes) every 10 min, for 16 consecutive nightsThe arrows represent the time of the ingestion of a large dose of DL-5-HTP (5 g per diem) (at 23 p.m. and 4 a.m.). Dotted line: Stages II, III and IV. Continuous line: Paradoxical sleep. Interrupted line: Sleep (II, III, IV) under placebos given at the same time when 5-HTP is usually given (16 nights). |