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"It's time, you must wake up now".

P Lavie, A Oksenberg, J Zomer

    Perceptual and Motor Skills
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Some individuals can accurately wake up at a set time, especially from REM sleep. This ability may depend on motivation and sleep stage, though accuracy can decrease with repeated testing.

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    Area of Science:

    • Sleep Science
    • Chronobiology
    • Human Performance

    Background:

    • The ability to awaken at a predetermined time is a poorly understood phenomenon.
    • Investigating the factors influencing accurate, self-initiated awakenings is crucial for understanding sleep-wake regulation.

    Purpose of the Study:

    • To investigate the accuracy and reliability of self-initiated awakenings at predetermined times.
    • To explore the relationship between sleep stage, particularly Rapid Eye Movement (REM) sleep, and the ability to awaken at a target time.

    Main Methods:

    • Seven subjects reporting accurate waking abilities participated in laboratory sleep studies.
    • Subjects were instructed to awaken at specific predetermined times (03:30 and 05:30) over two nights.
    • Sleep stages were monitored, and awakening times were recorded and compared to target times. Two high-performing subjects underwent further testing.

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    Main Results:

    • Out of 12 spontaneous awakenings, 8 occurred within a 20-minute window of the target time.
    • A significant proportion of these accurate awakenings (8 out of 12) originated from REM sleep.
    • Extended testing revealed a decline in accuracy for the best performers, with only 2 awakenings within the target window over 7 additional nights.

    Conclusions:

    • The study suggests that some individuals possess a genuine ability to awaken at predetermined times.
    • This capacity appears to be linked to specific sleep stages, notably REM sleep, and potentially influenced by motivational factors.
    • Accuracy may not be consistently maintained, indicating potential limitations or variability in this self-waking ability.