289 sleep stages

stage 1

light sleep lasting 1-7 minutes

stage 1

breathing and heart rate slow as muscle tension and body temperature decline

stage 1

alpha waves give away to theta waves

stage 1

hypnic jerks occur

stage 2

typically lasts about 10-25 minutes

stage 2

brief bursts of sleep spindles appear

stage 3 and 4

slow wave sleep

stage 3 and 4

high-amplitude, low-frequency delta waves become prominent

stage 3 and 4

individuals stay here for roughly 30 minutes

stage 5

REM sleep

stage 5

marked by irregular breathing and pulse rate

stage 5

dominated by high-frequency beta waves

stages 1 through 4

non-REM (NREM) sleep

beta waves

13-24cps

beta waves

normal waking thought, alert problem solving

alpha waves

8-12cps

alpha waves

deep relaxation, blank mind, meditation

theta waves

4-7cps

theta waves

light sleep

delta waves

less than 4cps

delta waves

deep (dreamless) sleep

alpha waves and theta waves

more prominent in EEG recordings when in a meditative state

beta waves

waves present during REM sleep