Stage 1
-kind of awakeful and kind of asleep
- only last a few minutes and you usually only experiences it once a night
-eye begin to roll slightly
-your brain produces theta waves ( high amplitude, low frequencies)
Stage 2
-this follow stage 1 sleep and is the baseline of sleep
-this stage is part of the 90 minute cycle and occupies aproxiamtely 45-60 of sleep
Sleep spindles, short burst of brain waves
Stage 3 and 4
- slow wave sleep
- you produce delta waves
- if awaken you will be very groggy
- vital for resorting body growth hormones and good overall health
Last 15-30 min
REM sleep
- rapid eye moment
-brain is very active
- dreams usually occur in REM
- composes 20-25% of a normal night of sleep
- breathing, heart rate, and brain wave actively quicken
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