Phase Difference Between Chronotypes in Self-Reported Maximum of Alertness Rhythm

Journal of Psychophysiology(2014)

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摘要
An objective physiological predictor of self-reported chronotypological differences in circadian timing of alertness peak (> 5 hr) has not been yet identified. Our goals were to establish external validity of such a predictor, and to explain the observations of inequality of chronotypological differences in alertness peak and bed/rising times (> 5 and < 3 hr, respectively). The resting electroencephalogram was recorded at 3-hr intervals during 24-hr sustained wakefulness of 130 healthy participants. An objective index (alpha-theta power difference) was calculated for the eyes closed section of each record. The time course of subjective alertness-sleepiness was compared with the time course of the objective index and simulated with a rhythmostatic model. External validity of the objective predictor of chronotypological differences was supported by the resemblance between the time courses, and the simulations revealed contribution of other than circadian phase parameters of the chronoregulatory processes to the appearance of > 5-hr chronotypological difference between alertness peaks.
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关键词
chronotype,sleep deprivation
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