News tagged with rem sleep
Uncovering the evolution of REM sleep: Ostriches sleep like platypuses
(PhysOrg.com) -- The brain activity of ostriches in REM sleep is unique, alternating between fast, small waves - characteristic of REM sleep in other birds, and large, slow waves typical of those occurring ...
Aug 25, 2011 |
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Early indications of Parkinson's disease revealed in dream sleep
During a large-scale study of the socioeconomic costs of this neurodegenerative disease, Danish researchers, some from the University of Copenhagen, discovered that very early symptoms of Parkinson's disease may be revealed ...
Medicine & Health / Neuroscience
Mar 28, 2011 |
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Probing Question: What is a lucid dream?
Have you ever had a dream that just didn’t feel like a dream -- where, like Alice in Wonderland, you had trouble telling fiction from reality? Perhaps you even felt like you had control over what was happening, ...
Aug 26, 2010 |
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REM sleep deprivation plays a role in chronic migraine
Reporting at the American Headache Society's 52nd Annual Scientific Meeting in Los Angeles this week, new research shows that sleep deprivation leads to changes in the levels of key proteins that facilitate events involved ...
Medicine & Health / Medical research
Jun 23, 2010 |
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Acting out while asleep: a strange sleep disorder
During the day, Lawrence Neumann was a mild mannered man, considerate, kind and loving to his wife of many years, Bonnie.
Medicine & Health / Diseases, Conditions, Syndromes
Apr 09, 2010 |
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Severe sleep apnea decreases frequency of nightmare recall
A study in the Feb. 15 issue of the Journal of Clinical Sleep Medicine shows that patients with severe obstructive sleep apnea (OSA) report a significantly lower frequency of nightmares than patients with mild or no sleep ...
Medicine & Health / Sleep apnea
Feb 15, 2010 |
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Intervention and feedback lead to improved sleep
(PhysOrg.com) -- Using the Zeo Personal Sleep Coach, which records a sleeper's time in light, deep and REM sleep through a small, wireless headband sensor, professor James Maas teaches students about their sleep.
Medicine & Health / Psychology & Psychiatry
Feb 12, 2010 |
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Dreams may have an important physiological function
(PhysOrg.com) -- Dreams have long been assumed to have psychological functions such as consolidating emotional memories and processing experiences or problems, but according to a Harvard psychiatrist and sleep ...
Medicine & Health / Neuroscience
Nov 12, 2009 |
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Naps with rapid eye movement sleep increase receptiveness to positive emotion
Naps with rapid eye movement (REM) sleep refresh the brain's empathetic sensitivity for evaluating human emotions by decreasing a negative bias and amplifying recognition of positive emotions.
Jun 10, 2009 |
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Let me sleep on it: Creative problem solving enhanced by REM sleep
Research led by a leading expert on the positive benefits of napping at the University of California, San Diego School of Medicine suggests that Rapid Eye Movement (REM) sleep enhances creative problem-solving. The findings ...
Medicine & Health / Medical research
Jun 08, 2009 |
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Jet lag disturbs sleep by upsetting internal clocks in 2 neural centers
Jet lag is the bane of many travelers, and similar fatigue can plague people who work in rotating shifts. Scientists know the problem results from disruption to the body's normal rhythms and are getting closer to a better ...
Medicine & Health / Neuroscience
Apr 16, 2009 |
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Stages of sleep have distinct influence on process of learning and memory
Research on the sleeping brain has revealed some fascinating stage-dependent interactions between areas involved in formation and storage of long term memories. The study, published by Cell Press in the February 26th issue ...
Medicine & Health / Medical research
Feb 25, 2009 |
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Sleep disorders: A warning sign for neurodegenerative disease?
According to the latest study by Dr. Ronald Postuma from the Research Institute of the MUHC and Dr. Jacques Montplaisir from the Université de Montréal and the Hôpital du Sacré-Cœur de Montréal, ...
Medicine & Health / Diseases, Conditions, Syndromes
Dec 24, 2008 |
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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.
For more information about Rapid eye movement sleep, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
