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  2. Circadian rhythm sleep disorder - Wikipedia

    en.wikipedia.org/.../Circadian_rhythm_sleep_disorder

    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. [4]

  3. 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).

  4. Circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm

    A circadian rhythm (/ s ər ... In clinical settings, an abnormal circadian rhythm in humans is known as a circadian rhythm sleep disorder. [4] History

  5. How Circadian Rhythm Disorders Can Affect Your Sleep - AOL

    www.aol.com/circadian-rhythm-disorders-affect...

    All of these are examples of circadian rhythm disorders, which are problems with the alignment between your sleep-wake cycle and your responsibilities for the day—like going to work or school ...

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

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

    Non-24-hour sleep–wake disorder (non-24, [1] N24SWD, [2] or N24) is one of several chronic circadian rhythm sleep disorders (CRSDs). It is defined as a "chronic steady pattern comprising [...] daily delays in sleep onset and wake times in an individual living in a society". [3]

  7. 3 Winter Sleep Problems & How to Fix Them - AOL

    www.aol.com/3-winter-sleep-problems-fix...

    Seasonal Affective Disorder (SAD) is more common in winter due to the lack of sunlight, causing sleep disturbances. ... That’s because the extra darkness messes with natural circadian rhythms ...

  8. 10 Tips to Increase REM Sleep Naturally - AOL

    www.aol.com/10-tips-increase-rem-sleep-115700126...

    The circadian rhythm helps trigger REM sleep at specific times during the sleep cycle. Here are a few additional tips to enhance your bedroom for better sleep: Fine-tune the temperature .

  9. Delayed sleep phase disorder - Wikipedia

    en.wikipedia.org/wiki/Delayed_sleep_phase_disorder

    Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep–wake phase disorder, is the delaying of a person's circadian rhythm (biological clock) compared to those of societal norms.