Evolutionary Theory of Sleep

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  • Evolutionary Theory
    • Variations in animal sleep patterns
      • Sleep is adaptive
        • If not, it would have disappeared
      • Natural selection
      • Promotes survival
    • Low nutrients in food = less sleep
    • Meddis
      • Predator/preyrelationship
        • Sleep for protection
    • Webb
      • Hibernation theroy
        • Energy conservation
          • 110 cals
    • Tiger = 20 Giraffe = 4.6 Polar bear = 8 Koala = 20
    • Vulnerability
      • Unconscious
      • Hidden
    • Genome lag
      • More relevant in past
        • Sleep pattern decrease since electricity
    • Low adaptive value
      • Indus dolphins sleep 1/2 brain at a time
    • Post hoc
      • Non falsifiable
      • Lacks scientific validity
    • Deterministic & Reductionist
      • Doesn't explain stages
      • Ignores rebound effect

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