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  2. 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]

  3. Delayed sleep phase disorder - Wikipedia

    en.wikipedia.org/wiki/Delayed_sleep_phase_disorder

    The light is typically timed for 30–90 minutes at the patient's usual time of spontaneous awakening, or shortly before (but not long before), which is in accordance with the phase response curve (PRC) for light. Only experimentation, preferably with specialist help, will show how great an advance is possible and comfortable.

  4. 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]

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

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

    Waking up during this time can mean that you're backed up with "waste" in the form of negative emotions, and that you need to process them in order to flush them out.

  6. 15 Reasons You Keep Waking Up in the Middle of the Night - AOL

    www.aol.com/news/15-reasons-keep-waking-middle...

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  7. Why do I keep waking up at night to pee — and how do I stop?

    www.aol.com/why-keep-waking-night-pee-010025136.html

    To find out, I spoke with Xue Ming, a sleep expert and professor of neurology at the Rutgers New Jersey Medical School. Ming suggests first asking yourself if you snore or breathe heavily while ...

  8. Dawn simulation - Wikipedia

    en.wikipedia.org/wiki/Dawn_simulation

    A dawn simulator can be used as an alarm clock. Light enters through the eyelids triggering the body to begin its wake-up cycle, including the release of cortisol, so that by the time the light is at full brightness, sleepers wake up on their own, without the need for an alarm. Most commercial alarm clocks include a "dusk" mode as well for bedtime.

  9. Nocturnal penile tumescence - Wikipedia

    en.wikipedia.org/wiki/Nocturnal_penile_tumescence

    The goal of nocturnal penile tumescence testing is to determine whether one can experience an erection while sleeping after reporting that they are unable to experience an erection while awake. On average, one has 3–5 episodes of NPT each night, and each episode lasts 30–60 minutes, although the duration is reduced with advanced age. [16]