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  2. Circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm

    A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours.Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).

  3. Daycare teacher's controversial nap time rule divides the ...

    www.aol.com/news/daycare-teachers-controversial...

    “If daycare closes at 5:30 and that’s when you pick up your child, by the time you go and grab dinner or get home and then make dinner, its about 6:30 — maybe 7 o’clock?

  4. Circadian rhythm sleep disorder - Wikipedia

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

    Circadian rhythm sleep disorders (CRSD), also known as circadian rhythm sleep–wake disorders (CRSWD), are a family of sleep disorders that affect the timing of sleep. CRSDs cause a persistent pattern of sleep/wake disturbances that arise either by dysfunction in one's biological clock system, or by misalignment between one's endogenous oscillator and externally imposed cues.

  5. Circadian clock - Wikipedia

    en.wikipedia.org/wiki/Circadian_clock

    In vertebrates, the master circadian clock is contained within the suprachiasmatic nucleus (SCN), a bilateral nerve cluster of about 20,000 neurons. [10] [11] The SCN itself is located in the hypothalamus, a small region of the brain situated directly above the optic chiasm, where it receives input from specialized photosensitive ganglion cells in the retina via the retinohypothalamic tract.

  6. Why your phone doesn’t make for the best alarm clock - AOL

    www.aol.com/one-small-thing-help-sleep-130059433...

    Most adults should get seven to nine hours of sleep a night, according to the National Sleep Foundation. But population research from the foundation has shown that 60% of adults are not meeting ...

  7. Non-24-hour sleep–wake disorder - Wikipedia

    en.wikipedia.org/wiki/Non-24-hour_sleep–wake...

    This slight deviation is, in almost everyone, corrected by exposure to environmental time cues, especially the light–dark cycle, which reset the clock and synchronize (entrain) it to the 24-hour day. Morning light exposure resets the clock earlier, and evening exposure resets it later, thereby bracketing the rhythm to an average 24-hour period.

  8. Entrainment (chronobiology) - Wikipedia

    en.wikipedia.org/wiki/Entrainment_(chronobiology)

    When good sleep hygiene is insufficient, a person's lack of synchronization to night and day can have health consequences. There is some variation within normal chronotypes' entrainment; it is normal for humans to awaken anywhere from about 5 a.m. to 9 a.m.

  9. Screen time - Wikipedia

    en.wikipedia.org/wiki/Screen_time

    This research showed that out of the 28,484 preschool aged children in the study it was concluded that children with two or more hours of screen time a day showed to have 1.54 to 2.38 times more odds of having a speech disorder and had 1.96 times more likely to have a type of learning disability, then those children who had an hour or less of ...

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