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Int Rev Neurobiol. 2010;93:109-27. doi: 10.1016/S0074-7742(10)93005-5.

Preparation for awakening: self-awakening vs. forced awakening preparatory hangs in the pre-awakening period.

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Department of Behavioral Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima City 739-5821, Japan.


Self-awakening (SA) is awakening by oneself at predetermined time without external means. Attempting to SA produces various kinds of preparatory changes over the course of a sleep period, including contributing to a decline in the waking threshold immediately before awakening. As a result, one can easily awake from sleep, and sleep inertia immediately after awakening from sleep reduces. In addition, daytime arousal level is higher for those who have the habit of SA. Surveys revealed that not a few people have the habit of SA and that they tend to be morningness chronotypes. Many factors are involved in the successful SA, such as psychological stress, motivation, personality trait, ambient environment, circadian and homeostatic process, and time perception.

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