Stages of Sleep

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