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Sleep Stages
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Consciousness
Awareness of yourself and your enviroment
NREM-1
Light sleep, hallucinations
NREM-2
Sleep spindles (bursts of activity)
NREM-3
Deepest sleep, delta waves, night terrors, sleepwalking
REM
Rapid eye movement, dreaming, brain activity increases, body is paralyzed.
Sleep Cycle Length
~90 mins