Circadian rhythm
changes as you age
24 hr clock (internal)
Sleep stages
1) sleep onset! Body relax! (Hallucinating) dreams!
2) body muscle tone drops! No dreams!
3) body paralysis: neural block!
4) deepest sleep! Dreaming
5) rapid eye movement (REM) Dreaming!
Wide awake
Alpha waves
Drowsiness
Stage 1 aka sleep onset
Alpha/ theta
Light sleep
Stage 2
Theta waves
Deep sleep
Stage 3
Theta/ delta
Deepest sleep
Stage 4
Delta
Review of your day (dreams)
REM sleep
Paradoxical sleep
Simulating future events
(Nightmares)
Waves similar to wakened state but not as constant or rapid