Sleep
Stages
un
seel
.com · EEG waves · NREM · REM · 4-5 cycles
stage
idle
wave type
—
frequency
—
stage
—
beta waves (awake)
theta waves (light sleep)
sleep spindles (stage 2)
delta waves (deep sleep)
REM (dreaming)
▶ Play
←
→
🔇 Unmute
Reset
Un
seel
.com · Sleep Stages