3. Theories of Sleep & Sleep Disorders Today’s Goal: Why do we sleep and what happens when disorders prevent us from getting good sleep?

4. Why Do We Sleep? ProtectsProtects Restore & repairRestore & repair Making memoriesMaking memories Creative thinkingCreative thinking GrowthGrowth

5. Sleep Deprivation Genetic & cultural influences on how much sleep we needGenetic & cultural influences on how much sleep we need Lack of sleepLack of sleep –Takes a long time to repay sleep debt –Sleep deprivation = weight gain –Suppresses immune system –Effects similar to aging –Fatal accidents

6. Insomnia

7. Hypersomnia

8. Narcolepsy

9. Sleep Apnea

10. Somnambulism (Sleepwalking)

11. Night Terrors

12. Goal Revisited Which of the sleep disorders would you least like to suffer from?Which of the sleep disorders would you least like to suffer from? Of the sleep disorders, which would you rather suffer from?Of the sleep disorders, which would you rather suffer from?