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  2. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    Under experimental conditions, humans tend to alternate more frequently between sleep and wakefulness (i.e., exhibit more polyphasic sleep) if they have nothing better to do. [33] Given a 14-hour period of darkness in experimental conditions, humans tended towards bimodal sleep, with two sleep periods concentrated at the beginning and at the ...

  3. Neuroscience of sleep - Wikipedia

    en.wikipedia.org/wiki/Neuroscience_of_sleep

    NREM sleep itself is divided into multiple stages – N1, N2 and N3. Sleep proceeds in 90-minute cycles of REM and NREM, the order normally being N1 → N2 → N3 → N2 → REM. As humans fall asleep, body activity slows down. Body temperature, heart rate, breathing rate, and energy use all decrease. Brain waves slow down.

  4. A Sleep Expert Warns Against "Unhealthy" Sleep Trend - AOL

    www.aol.com/sleep-expert-warns-against-unhealthy...

    Human beings have a sleep pattern that is about 24 hours. It's actually 24 hours and 20 minutes, and we have to realign our sleep every day, because if you don't, you can get screwed up easily.

  5. Why We Sleep - Wikipedia

    en.wikipedia.org/wiki/Why_We_Sleep

    Why We Sleep: The New Science of Sleep and Dreams (or simply known as Why We Sleep) is a 2017 popular science book about sleep written by Matthew Walker, an English scientist and the director of the Center for Human Sleep Science at the University of California, Berkeley, who specializes in neuroscience and psychology.

  6. Why getting more deep sleep may help improve memory - AOL

    www.aol.com/why-getting-more-deep-sleep...

    We have lots of work to do to really understand the sleeping human brain. Our study is only the beginning. Understanding the sleeping brain will help us tackle disorders, such as memory impairment ...

  7. What Is Deep Sleep? Understanding the 4 Sleep Cycles & Why ...

    www.aol.com/deep-sleep-understanding-4-sleep...

    Why Deep Sleep Matters: Understanding the Sleep . Your total sleep time — ideally about eight hours — is broken down into a few cycles. Then those cycles are broken into stages within two ...

  8. Sleep and metabolism - Wikipedia

    en.wikipedia.org/wiki/Sleep_and_Metabolism

    Sleep plays a vital role in regulating metabolism and appetite. When sleep deprived, the metabolic system will be out of balance, which will ultimately affect the dietary choices people make. Teens who are sleep deprived crave more carbohydrates. Sleep deprivation is a risk factor for obesity among young adults. [7] [medical citation needed]

  9. Sleep hygiene: What it is and how to establish a better ... - AOL

    www.aol.com/lifestyle/sleep-hygiene-establish...

    Sleep is commonly referred to as the third pillar of health, yet research repeatedly shows that as many as one-third of Americans aren't getting enough of it. According to the American Academy of ...