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Sleep

Sleep. ION Program Summer 2013. electroencephalogram - EEG - record of the electrical activity of many neurons directly under the electrode - on the surface of cortex. This record is made from outside the skin.

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Sleep

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  1. Sleep ION Program Summer 2013

  2. electroencephalogram - EEG - record of the electrical activity of many neurons directly under the electrode - on the surface of cortex. This record is made from outside the skin. Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  3. We define sleep stages by the kinds of EEG waves seen at each stage Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  4. We go through several cycles of sleep each night Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  5. Sleeping patterns change with age Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  6. Two Biological Clocks in the Brain Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  7. Our daily cycle (circadian rhythm) is determined in part by the SCN (suprachiasmatic nucleus) in the hypothalamus Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  8. Consequences of Lack of Sleep • Limits your ability to concentrate and solve problems* • Increase acne* • Lead to aggressive or inappropriate behavior* • 100,000 Driving Accidents and 1,500 deaths each year from driving drowsy** *According to National Sleep Foundation ** According to the National Highway Safety Transportation Administration

  9. WHY do we sleep? rest/restoration hypothesis we sleep to replenish energy, repair tissues evidence: marathon runners spend more time in deep sleep for 2 nights after Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  10. “adaptive” or preservation/protection theory: it’s dangerous out there; you’re safer if you spend some time hidden and unconscious evidence: large herbivores who must eat constantly and have trouble hiding sleep LESS - giraffes = 20 min at time 2-3x per day animals with few natural predators sleep more - lions smaller animals that don’t need to graze sleep more - bats Slide from Chris Goode, PhD, PSYC 1100: Natural Sciences Aspect of Psychology, Week 9: Consciousness Spring 2008

  11. Memory Consolidation? • Sleep helps to strengthen or “consolidate” new memories in the brain • Rats spend more time in REM sleep after learning new tasks • If deprived of REM sleep, weaker recall • Some of these results inconsistent • Babies and Infants more time in REM Sleep • Dolphins don’t experience REM

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