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  2. Music and sleep - Wikipedia

    en.wikipedia.org/wiki/Music_and_sleep

    Persistent sleeping disturbances can lead to fatigue, irritability, and various health issues. Numerous studies have examined the positive impact of music on sleep quality. As early as 2000 B.C., lullabies were designed to aid infant sleep. For adults with sleep-related disorders, music serves as a useful intervention in reducing stress.

  3. Slow-wave sleep - Wikipedia

    en.wikipedia.org/wiki/Slow-wave_sleep

    Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves. [ 2 ] Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night. [ 3 ]

  4. Lullaby - Wikipedia

    en.wikipedia.org/wiki/Lullaby

    A lullaby (/ ˈ l ʌ l ə b aɪ /), or a cradle song, is a soothing song or piece of music that is usually played for (or sung to) children (for adults see music and sleep). The purposes of lullabies vary. In some societies, they are used to pass down cultural knowledge or tradition.

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

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

    Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. ... Most adults who sleep the recommended seven to nine hours a night get about one to two hours of ...

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

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

    A new study offers an explanation as to how deep sleep — also known as slow wave sleep — helps support the formation of memories in the brain, which could help with preventing dementia.

  7. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    The whole period normally proceeds in the order: N1 → N2 → N3 → N2 → REM. REM sleep occurs as a person returns to stage 2 or 1 from a deep sleep. [18] There is a greater amount of deep sleep (stage N3) earlier in the night, while the proportion of REM sleep increases in the two cycles just before natural awakening. [15]