NATURE OF SLEEP

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NATURE OF SLEEP

5 STAGES of sleep

5 sleep CYCLES

between each cycle -> experience NREM sleep-> then REM

during NREM -> 4 STAGES -> progresses to (STAGES 1 and 2) into DEEP or SLOW -WAVE sleep (STAGES 3 and 4)

RAPID EYE- MOVEMENT (REM) sleep = experienced several times -> during night= produce intense electrical activity

Stage 1 and 2

Light sleep and CHANGE- ELECTRICAL ACTIVITY IN BRAIN

part of the brain which is AWAKE= produces BETA WAVES

changes to ALPHA and THETA waves

HEART RATE SLOWS and TEMPERATURE DECREASES

SLEEPER= in RELAXED STATE = easily woken