rem sleep

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rem sleep

A person experiences REM sleep during the night.

Definition

Noun: * Rapid Eye Movement sleep: A distinct, recurring stage of the sleep cycle characterized by rapid, random movements of the eyes, increased brain activity, muscle atonia (paralysis), and is the period most closely associated with vivid dreaming.

Usage
  • "REM sleep" is an uncountable noun. It refers to the sleep state itself, not individual instances.
  • It is often used in scientific, medical, and psychological contexts to discuss sleep architecture and health.
  • The term is frequently contrasted with "non-REM sleep" (NREM sleep).
Examples
Advanced Usage
  • "REM sleep behavior disorder": A sleep disorder where the muscle paralysis normally present during REM sleep is absent, causing individuals to physically act out their dreams.
  • "REM sleep latency": The period of time between falling asleep and the onset of the first REM period. Shortened latency can be associated with certain conditions like depression.
  • "REM rebound": The phenomenon where a person experiences longer and more intense periods of REM sleep after a period of REM sleep deprivation.
Variants and Related Words
  • REM (noun/acronym): A common shorthand for "REM sleep" (e.g., "He entered REM about 90 minutes after falling asleep").
  • Paradoxical sleep (noun): An alternative scientific name for REM sleep, referring to the paradox of a sleeping body with a brain that is active and awake-like.
  • Desynchronized sleep (noun): Another technical term for REM sleep, referring to the desynchronized (fast, low-amplitude) brain wave patterns observed.
  • Non-REM sleep / NREM sleep (noun): The collective term for the other stages of sleep (Stages 1, 2, and 3) not characterized by rapid eye movements.
Synonyms
  • Dream sleep (noun): A less technical synonym emphasizing the association with dreaming.
  • Active sleep (noun): Sometimes used, particularly in developmental contexts (e.g., describing infant sleep patterns).
Related Phrases
  • To enter REM (sleep): To begin a period of REM sleep.
    • After a period of deep sleep, the brain will enter REM.
  • REM period / REM episode: Refers to one specific occurrence of REM sleep within the sleep cycle.
    • The first REM period of the night is usually the shortest.
rem sleep

A person experiences REM sleep during the night.

Noun
  1. a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep

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