Stages of Sleep
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19 Terms
Transitional phase between wakefulness and sleep (drifting off)
Stage 1 sleep
State of deep relaxation (still somewhat easy to wakeup)
Stage 2 sleep
Theta waves
Stage 2 sleep
Rapid eye movement
REM sleep
Alpha/Theta waves
Stage 1 sleep
'“Awake Waves”
REM Sleep
Delta Waves
Stage 3 Sleep
Lasts about 20 minutes
Stage 2 Sleep
Lasts about 5 minutres
Stage 1 Sleep
Easy to awaken
Stage 1 Sleep
Hallucinations, jerking motions
Stage 1 Sleep
Sleep spindles (learning memory)
Stage 2 Sleep
K-Complexes (response to evironmental stimuli = higher levels of arousal)
Stage 2 Sleep
Deep Sleep, or slow wave sleep
Stage 3 sleep
much harder to wake someone up from this stage
Stage 3 sleep
lasts 35-45 min
REM sleep
Paralysis of muscles
REM sleep
Paradoxical - high brain activity, low muscle activity
REM Sleep
Lasts 30 min
Stage 3 sleep
Note 
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