Comparing Sleep Stages

"Comparing sleep stages can support improving sleep quality by helping to understand the distinct roles of REM and non-REM periods in physical repair and mental refreshment."

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| Comparing Sleep Stages

Comparing Sleep Stages

Feature	REM	NON-REM
Brain Activity	High, active brain	Low, slow waves
Eye Movements	Rapid eye movements	Motionless eyes
Muscle Tone	Muscles are paralyzed	Muscles are relaxed but active
Dreaming	Intense dreams	Dreaming is rare
Depth	Shallow	Deep sleep
Body Repair	Brain repair and memory consolidation	Physical repair and growth
Duration	~30 minutes (followed by NON-REM)	~90 minutes (followed by REM)