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  2. Effects of sleep deprivation on cognitive performance

    en.wikipedia.org/wiki/Effects_of_sleep...

    Lack of sleep appears to negatively affect one's ability to appreciate and respond to increasing complexity, as was found in performance deficits after 1 night of sleep deprivation on a simulated marketing game. [27] The game involved subjects promoting a fictional product while getting feedback on the financial effects of their decisions.

  3. Why Am I Tired All the Time? We Have a Few Answers - AOL

    www.aol.com/why-am-tired-time-few-201000577.html

    6 Reasons You Might Be Tired All the Time. While it is normal to feel tired, sometimes it can be something more serious. In fact, fatigue is a key symptom of the following health conditions. 1 ...

  4. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    Other researchers have questioned these claims. A 2004 editorial in the journal Sleep stated that, according to the available data, the average number of hours of sleep in a 24-hour period has not changed significantly in recent decades among adults. Furthermore, the editorial suggests that there is a range of normal sleep time required by ...

  5. REM rebound - Wikipedia

    en.wikipedia.org/wiki/REM_rebound

    After five nights, the remaining subjects were allowed to sleep undisturbed, and showed a significant increase in percentage of sleep devoted to REM: from an average of 19.4% to an average of 26.6%. These effects were significant in comparison with a control group woken up on an equal number of occasions each night, at arbitrary times.

  6. Do You Always Wake Up Tired? Here’s Why, According to ... - AOL

    www.aol.com/lifestyle/always-wake-tired-why...

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  7. Is 4 hours of sleep enough? What sleeping too little does to ...

    www.aol.com/news/4-hours-sleep-enough-sleeping...

    The day after sleeping for four hours, you'll likely experience a few different changes. ... (4–12 months old): 12–16 hours, including naps. Toddlers (1–2 years old): 11–14 hours ...

  8. Sleep debt - Wikipedia

    en.wikipedia.org/wiki/Sleep_debt

    Main health effects of sleep deprivation, [1] indicating impairment of normal maintenance by sleep. Sleep debt or sleep deficit is the cumulative effect of not getting enough sleep. A large sleep debt may lead to mental or physical fatigue, and can adversely affect one's mood, energy, and ability to think clearly.

  9. Fatigue - Wikipedia

    en.wikipedia.org/wiki/Fatigue

    Fatigue is a state of tiredness (which is not sleepiness), exhaustion [1] or loss of energy. [2] [3]Fatigue (in the medical sense) is sometimes associated with medical conditions including autoimmune disease, organ failure, chronic pain conditions, mood disorders, heart disease, infectious diseases, and post-infectious-disease states. [4]

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