SLEEP.

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Presentation transcript:

SLEEP

The awareness of our sensations, perceptions & thoughts. SLEEP CONSCIOUSNESS The awareness of our sensations, perceptions & thoughts.

WHY DO WE SLEEP?

We sleep to … Replenish Chemicals-repair and restoration Growth-growth hormone is released by pituitary gland in sleep

WHAT ARE THE MAJOR EFFECTS OF SLEEP DEPRIVATION?

SLEEP DEPRIVATION EFFECTS INCLUDE … Fatigue Diminished immunity to disease Irritability Inattention Hand tremors etc… Example-New York disc jockey, Peter Tripp, stayed awake for 200 hrs to raise money for a charity. He experienced visual illusions & could not do simple arithmetic.

STAGES OF SLEEP Stages 1-4 (Note: even more stages recognized today) Stage 1-light sleep-brain waves similar to being awake Stage 4-Very difficult to awake at this stage We proceed through 4 stages approximately every 90 min

REM SLEEP ‘Rapid Eye Movement’ Occurs during Stage 1 Can determine if subject is dreaming by their eye movements If REM sleep is interrupted subject becomes short tempered & less able to concentrate