NREM sleep
Noun: A recurring sleep state characterized by the absence of rapid eye movements and the absence of dreaming. This stage constitutes the majority of normal sleep time and is associated with synchronized brain activity, physical restoration, and memory consolidation. It is often contrasted with REM (Rapid Eye Movement) sleep.
NREM sleep is used as a scientific and medical term to describe a specific phase of the sleep cycle. It is typically discussed in contexts related to sleep science, health, psychology, and medicine. - The study monitored the participants' brain waves to distinguish between NREM and REM sleep. - Deep, restorative sleep primarily occurs during the NREM stages.
- "to be in NREM sleep": to be experiencing this specific sleep stage.
- The patient's EEG showed he was in NREM sleep.
- "NREM sleep architecture": refers to the structure, pattern, and proportion of NREM sleep stages throughout the night.
- Aging often changes a person's NREM sleep architecture.
- Non-REM sleep: A full, alternative term for NREM sleep.
- Slow-wave sleep (SWS): A specific, deep stage (Stage 3) within NREM sleep, characterized by delta waves.
- REM sleep: The contrasting sleep stage characterized by rapid eye movements and vivid dreaming.
- Non-rapid eye movement sleep (formal synonym)
- Quiet sleep (a less technical term sometimes used, particularly in contrast to 'active' REM sleep)
- NREM-REM cycle: The repeating pattern of NREM and REM sleep stages throughout the night.
- A full NREM-REM cycle lasts about 90 to 110 minutes.
NREM sleep is traditionally divided into three stages (N1, N2, N3), with N3 representing the deepest sleep. It is crucial for physical recovery, growth hormone release, and declarative memory processing.
- a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time