slow-wave sleep

noun

Definition of slow-wave sleep

: the phase of non-REM sleep marked by the deepest sleep and the highest levels of delta wave activity with brain and muscle activity significantly reduced, loss of response to external stimuli greatest, and with heart rate and respiration at lowest levels

Note: Sleep time spent in slow-wave sleep is of longer duration during infancy and childhood.

Deep, or slow-wave sleep, when the body secretes human growth hormone, is critical for development and physical repair.— Melinda Beck Members of a second group were awakened every time they entered slow-wave sleep, a stage when dreams tend not to occur.— Sandra Blakeslee abbreviation SWS

Examples of slow-wave sleep in a Sentence

Recent Examples on the Web The researchers discovered that eating more saturated fat and less fiber from foods like vegetables, fruits and whole grains led to reductions in slow-wave sleep, which is the deep, restorative kind. Star Tribune, "How foods may affect our sleep," 8 Jan. 2021 Aromatherapy using lavender oil may also increase time spent in deep, slow-wave sleep. Meghan Overdeep, Southern Living, "Lavender Sales Are Surging Amid Pandemic," 20 Aug. 2020 Another important stage of sleep is deep sleep, when your brain waves slow into what is called delta waves or slow-wave sleep. Sandee Lamotte, CNN, "Get better sleep by cuddling up with your partner," 25 June 2020 Video gaming has been linked to declines in verbal memory and restorative slow-wave sleep in school-aged children, but it has also been shown to improve motor performance and spatial abilities. Sandee Lamotte, CNN, "Not all screen time causes kids to underperform in school, study says," 23 Sep. 2019 The brain generates two distinct types of sleep—slow-wave sleep (SWS), known as deep sleep, and rapid eye movement (REM), also called dreaming sleep. Scientific American, "What Happens in the Brain During Sleep?," 1 Sep. 2015 Mednick said subjects on the drug typically would lose out on slow-wave sleep, or deep sleep, which is related to memory consolidation and physical and mental restoration. Lilly Nguyen, Daily Pilot, "Non-prescribed stimulants may improve short-term focus but fail users in the long run, UCI researchers say," 10 Sep. 2019 One study, published in the Journal of Clinical Sleep Medicine, found that participants with a higher intake of fiber and lower consumption of sugar and saturated fat spent more time in restorative, slow-wave sleep. Cynthia Sass, Mph, Health.com, "7 Healthy Late-Night Snacks," 3 July 2019 Those awakened from slow-wave sleep are groggy and disoriented. Carl Zimmer, New York Times, "Hot Heads: Why Mammals Need R.E.M. Sleep," 7 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'slow-wave sleep.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of slow-wave sleep

1964, in the meaning defined above

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The first known use of slow-wave sleep was in 1964

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Cite this Entry

“Slow-wave sleep.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/slow-wave%20sleep. Accessed 19 Apr. 2021.

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More Definitions for slow-wave sleep

slow-wave sleep

noun

Medical Definition of slow-wave sleep

: the phase of non-REM sleep marked by the deepest sleep and the highest levels of delta wave activity with brain and muscle activity significantly reduced, loss of response to external stimuli greatest, and with heart rate and respiration at lowest levels

Note: Sleep time spent in slow-wave sleep is of longer duration during infancy and childhood.

Members of a second group were awakened every time they entered slow-wave sleep a stage when dreams tend not to occur.— Sandra Blakeslee abbreviation SWS

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