sleep stage
Nightly consciousness cycle
Sleep stages are the distinct phases the brain cycles through during sleep, each characterized by different patterns of brain activity, eye movement, and muscle tone.
The major stages include light sleep, deep sleep (also called slow-wave sleep), and REM sleep, when most dreaming occurs.
A typical night involves multiple cycles through these stages: She kept waking during light sleep stages and never felt rested.
- REMAcronym for dreaming phase
- deepFar from surface
- lightVisible electromagnetic radiation
- NREMSleep lacking eye movement
- dreamingMental imagery during slumber
night terrors · drowsy · cycles · delta · theta · brain waves · brainwaves · twilight · drifting · restorative · spindles · waking up · drowsiness · unconscious · paralysis · vivid · tossing · restless
sleep stagewakefulness
State of being conscious
waking state · arousal · vigilance · alertness · consciousness
sleep stageREM sleep
Dreaming stage with eye movement
non-REM sleep · deep sleep · light sleep · rapid eye movement
sleep, stage, sleeps, slept, sleeping, sleeper, sleepers, sleepy, sleepless