News tagged with rem sleep
Dreaming takes the sting out of painful memories: study
They say time heals all wounds, and new research from the University of California, Berkeley, indicates that time spent in dream sleep can help.
Nov 23, 2011 |
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Study shows different anesthetics affects sleep cycles in different ways
(Medical Xpress) -- In the ongoing quest to find the exact way that anesthetics interact with the central nervous system, anesthesiology researchers have been examining whether the state induced by anesthetics resembles natural ...
Oct 04, 2011 |
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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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REM sleep behavior disorder is a risk factor for Parkinson's disease
Patients suffering REM sleep behaviour disorders dream nightmares in which they are attacked and pursued, with the particularity that they express them by screaming, crying, punching and kicking while sleeping. Lancet Neurology ...
Jul 29, 2011 |
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Potential cause of severe sleep disorder discovered, implications for Parkinson's disease
Researchers at the University of Toronto are the first to indentify a potential cause for a severe sleep disorder that has been closely linked to Parkinson's disease and other neurodegenerative diseases.
Medicine & Health / Neuroscience
Jun 15, 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 ...
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.
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 ...
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 ...
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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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.
