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  2. Delayed sleep phase disorder - Wikipedia

    en.wikipedia.org/wiki/Delayed_sleep_phase_disorder

    Occasional noncircadian days may occur (i.e., sleep is "skipped" for an entire day and night plus some portion of the following day), followed by a sleep period lasting 12 to 18 hours. The symptoms do not meet the criteria for any other sleep disorder causing inability to initiate sleep or excessive sleepiness.

  3. Why do I wake up at 3 a.m. every night? - AOL

    www.aol.com/keep-waking-middle-night-could...

    The most important thing to do when waking up in the middle of the night is to resist looking at the clock, Peters-Mathews said. “If the alarm is not going off, it’s not time to wake up. It ...

  4. Do you wake up at 4am? Scientists know what might be ... - AOL

    www.aol.com/news/do-you-wake-up-at-4-am...

    Researchers studied 300 people with ‘advanced sleep phase’.

  5. Waking at the same time each night reveals details ... - AOL

    www.aol.com/article/2016/07/14/waking-at-the...

    Therefore, waking up at the same time each night indicates an issue with that body part, or the emotions associated with it. ... they're offering a risk-free 100-night trial guarantee that every ...

  6. Circadian rhythm sleep disorder - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm_sleep...

    A circadian rhythm is an entrainable, endogenous, biological activity that has a period of roughly twenty-four hours. This internal time-keeping mechanism is centralized in the suprachiasmatic nucleus (SCN) of humans, and allows for the internal physiological mechanisms underlying sleep and alertness to become synchronized to external environmental cues, like the light-dark cycle. [3]

  7. Advanced sleep phase disorder - Wikipedia

    en.wikipedia.org/wiki/Advanced_sleep_phase_disorder

    Advanced Sleep Phase Disorder (ASPD), also known as the advanced sleep-phase type (ASPT) of circadian rhythm sleep disorder, is a condition that is characterized by a recurrent pattern of early evening (e.g. 7-9 PM) sleepiness and very early morning awakening (e.g. 2-4 AM).

  8. This Nighttime Habit Could Be A Key Indicator Of Dementia ...

    www.aol.com/lifestyle/nighttime-habit-could-key...

    Try to go to bed and wake up at the same time each day, even on weekends. Try to exercise every day (but not close to bedtime) Get natural sunlight for at least 30 minutes day.

  9. Cortisol awakening response - Wikipedia

    en.wikipedia.org/wiki/Cortisol_awakening_response

    Waking up earlier in the morning increases the response. [11]Shift work: nurses working on morning shifts with very early awakening (between 4:00–5:30 a.m.) had a greater and prolonged cortisol awakening response than those on the late day shift (between 6:00–9:00 a.m.) or the night shift (between 11:00 a.m.–2:00 p.m.). [12]