Neuroscience
The sleep-deprived brain can mistake friends for foes
If you can't tell a smile from a scowl, you're probably not getting enough sleep.
Jul 15, 2015
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2333
News tagged with rem sleep
Health
One in 10 people have 'near-death' experiences, according to new study
Mystical near-death experiences where people report a range of spiritual and physical symptoms, including out-of-body sensations, seeing or hearing hallucinations, racing thoughts and time distortion, affect around 10 per ...
Jun 29, 2019
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7
Neuroscience
Not all sleep is equal when it comes to cleaning the brain
New research shows how the depth of sleep can impact our brain's ability to efficiently wash away waste and toxic proteins. Because sleep often becomes increasingly lighter and more disrupted as we become older, the study ...
Feb 27, 2019
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1648
Medical research
Gut microbes: The key to normal sleep
With fall and winter holidays coming up, many will be pondering the relationship between food and sleep. Researchers led by Professor Masashi Yanagisawa at the University of Tsukuba in Japan hope they can focus people on ...
Nov 27, 2020
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530
Neuroscience
Kicking, yelling during sleep? Study finds risk factors for violent sleep disorder
Taking antidepressants for depression, having post-traumatic stress disorder or anxiety diagnosed by a doctor are risk factors for a disruptive and sometimes violent sleep disorder called rapid eye movement (REM) sleep behavior ...
Dec 26, 2018
3
109
Neuroscience
Dreamless nights: Brain activity during nonrapid eye movement sleep
(Medical Xpress) -- The link between dreaming and rapid eye movement (REM) sleep are well understood – but the fact that consciousness is reduced during nonrapid eye movement (NREM) sleep is not. Recently, scientists ...
Neuroscience
Deep sleep puts the 'REM' in remembering
When it comes to mental health and cognitive function, the importance of rapid eye-movement sleep - that deep, restorative stage of sleep that we cycle in and out of throughout the night - is so well established that experiments ...
May 13, 2016
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660
Neuroscience
Dietary prebiotics improve sleep, buffer impacts of stress, says study
In recent years, reams of research papers have shed light on the health benefits of probiotics, the "good bacteria" found in fermented foods and dietary supplements. Now a first-of-its kind study by University of Colorado ...
Feb 25, 2017
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515
Psychology & Psychiatry
Couples that spend the night in the same bed show increased REM sleep and synchronization of sleep architecture
In many countries, sharing a bed with a partner is common practice. Yet, research investigating the relationship between bed sharing and sleep quality is both scarce and contradictory. Most studies have compared co-sleep ...
Jun 25, 2020
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109
Neuroscience
Rapid eye movements in sleeping mice match where they are looking in their dreams, new research finds
Does rapid eye movement during sleep reveal where you're looking at in the scenery of dreams, or are they simply the result of random jerks of our eye muscles? Since the discovery of REM sleep in the early 1950s, the significance ...
Aug 26, 2022
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28
Rapid eye movement sleep
Rapid eye movement (REM) sleep is a normal stage of sleep characterized by rapid movements of the eyes. REM sleep is classified into two categories: tonic and phasic. It was identified and defined by Kleitman and Aserinsky in the early 1950s.
Criteria for REM sleep includes not only rapid eye movements, but also low muscle tone and a rapid, low voltage EEG -- these features are easily discernible in a polysomnogram, the sleep study typically done for patients with suspected sleep disorders.
REM sleep in adult humans typically occupies 20-25% of total sleep, about 90-120 minutes of a night's sleep. During a normal night of sleep, humans usually experience about 4 or 5 periods of REM sleep; they are quite short at the beginning of the night and longer toward the end. Many animals and some people tend to wake, or experience a period of very light sleep, for a short time immediately after a bout of REM. The relative amount of REM sleep varies considerably with age. A newborn baby spends more than 80% of total sleep time in REM. During REM, the activity of the brain's neurons is quite similar to that during waking hours; for this reason, the sleep stage may be called paradoxical sleep. This means that there are no dominating brain waves during REM sleep.
REM sleep is physiologically different from the other phases of sleep, which are collectively referred to as non-REM sleep (NREM). Vividly recalled dreams mostly occur during REM sleep.
This text uses material from Wikipedia, licensed under CC BY-SA
