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REM
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
(roentgen equivalent man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("rem" is a kind of...):
radioactivity unit (a measure of radioactivity)
Sense 2
Meaning:
A recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
Synonyms:
paradoxical sleep; rapid eye movement; rapid eye movement sleep; REM; REM sleep
Classified under:
Nouns denoting stable states of affairs
Hypernyms ("REM" is a kind of...):
sleep; slumber (a natural and periodic state of rest during which consciousness of the world is suspended)
Context examples:
When we sleep, our organism goes through different phases of sleep, however the brain remains interconnected during non-REM sleep, which was thought not to happen.
(Brain Is Still 'Connected' during Non-REM Sleep, The Titi Tudorancea Bulletin)
Moreover, recent studies in mice have shown that during sleep – including REM sleep – the brain selectively prunes synaptic connections made between neurons involved in certain types of learning.
(The brain may actively forget during dream sleep, National Institutes of Health)
Umberto Olcese, a researcher from the Swammerdam Institute for Life Sciences of the University of Amsterdam (Netherlands) and the rest of the research team (which involved researchers from the European CANON project and that was led by Prof. Cyriel Pennartz, who participates in the European Flagship Human Brain Project) have discovered that not all forms of communication within the cerebral cortex are lost during non-REM sleep.
(Brain Is Still 'Connected' during Non-REM Sleep, The Titi Tudorancea Bulletin)
REM is one of several sleep stages the body cycles through every night.
(The brain may actively forget during dream sleep, National Institutes of Health)
Narcolepsy is a disorder that makes people feel excessively sleepy during the day and sometimes experience changes reminiscent of REM sleep, like loss of muscle tone in the limbs and hallucinations.
(The brain may actively forget during dream sleep, National Institutes of Health)
Rapid eye movement, or REM, sleep is a fascinating period when most of our dreams are made.
(The brain may actively forget during dream sleep, National Institutes of Health)
In agreement with previous studies, the researchers found that a majority (52.8%) of hypothalamic MCH cells fired when mice underwent REM sleep whereas about 35% fired only when the mice were awake and about 12% fired at both times.
(The brain may actively forget during dream sleep, National Institutes of Health)
While many have shown that sleep helps the brain store new memories, others, including Francis Crick, the co-discoverer of the DNA double helix, have raised the possibility that sleep – in particular REM sleep – may be a time when the brain actively eliminates or forgets excess information.
(The brain may actively forget during dream sleep, National Institutes of Health)
