rapid eye movement sleep
Definition
Noun A stage of sleep characterized by quick, random movements of the eyes, increased brain activity, muscle relaxation, and vivid dreaming. It is one of the distinct phases of the sleep cycle.
Usage
"Rapid eye movement sleep" is a scientific and medical term. It is commonly abbreviated as REM sleep. It is used to describe a specific, recurring physiological state during the sleep cycle. * Most dreaming occurs during rapid eye movement sleep. * Researchers study brain waves during rapid eye movement sleep. * A full night's sleep includes several cycles of non-REM and rapid eye movement sleep.
Examples
- Infants spend a much larger proportion of their sleep in rapid eye movement sleep than adults do.
- The disruption of rapid eye movement sleep can lead to feelings of fatigue and poor concentration.
- During rapid eye movement sleep, your eyes dart back and forth behind closed eyelids.
Advanced Usage
- REM sleep behavior disorder: A condition where the normal muscle paralysis during REM sleep is absent, causing people to physically act out their dreams.
- REM sleep latency: The period of time it takes to enter the first REM sleep episode after falling asleep.
Variants and Related Words
- REM sleep (n): The standard abbreviation for "rapid eye movement sleep."
- Non-REM sleep (n): The collective term for the other stages of sleep that are not REM sleep.
- Paradoxical sleep (n): Another name for REM sleep, referring to the paradox of a sleeping body with a brain that is active and awake-like.
Synonyms
- REM sleep (n)
- Paradoxical sleep (n)
- Active sleep (n) (often used in the context of infant sleep)
Antonyms
- Non-REM sleep (n)
- Slow-wave sleep (n) (a deep stage of non-REM sleep)
Noun
-
a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
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