1. Psychology 110 Lecture 4 Consciousness 1-15-02
  1. Definition: the awareness of internal and external stimuli
    1. External events
    2. Internal sensation
  2. Self as a unique being
    1. Thoughts about your experiences
    2. James, first US Psychologist, Harvard 1902
    3. Stream of consciousness
  3. Moves through transitions between states
    1. Shifting and Changing, seems necessary
    2. Layer Cake model of consciousness
    3. Freud/Jung levels of awareness
      1. Conscious
      2. Pre-Conscious
      3. Unconscious
      4. (J) Collective Unconsciousness
  4. More or less is intuitively attractive
    1. Evolution
      1. Anticipatory thinking (Plotkin, 98)
      2. Adaptation
  5. Do animals have consciousness? At all, or duration
    1. Electro-physiology of consciousness
    2. Cheering crowd analogy
    3. Locus unknown, PET imaging filling need
  6. Circadian Rhythms
    1. Physiology is not constant, but cyclic on 24 hour cycle, light effects "northern exposure"
    2. Jet Lag, Irregular shifts, NASA discoveries of fragility of cycle
    3. Alertness, core body temperature, growth hormones follow 24 hour cycles
    4. Melatonin regulates biological clock
    5. Disruption adverse effects
  7. Sleep phenomenon
    1. Classification of EEG
      1. Characterized by frequency and amplitude
        1. Beta 13-24 Hz normal waking
        2. Alpha 8-12 Hz drowsy, deep relax Stage 1 Hypnic jerks
        3. Theta 4-7 Hz, sl.spindles light sleep Stage 2 slowing functions
        4. Delta >4 Hz deep sleep Stag 3,4 slow-wave sleep
        5. REM low amp, high freq dreams REM eye movement
      2. Cycle up and down through stages
      3. Napping
    2. Neural Basis
      1. Ascending reticular activating system
        1. Cutting causes perpetual sleep
      2. Midbrain pons generates REM sleep
        1. Five neurotransmitters involved
  8. Complex of structures and chemicals
    1. Sleep Deprivation
    2. Near-term, microsleeps, momentary blackouts
    3. Cognitive & perceptual motor goes to heck
      1. Partial deprivation degrades function > 5 hours per night
    4. REM deprivation studies, no debilitation, but reach state more often as though to catch up
      1. Same for Stage 4, as though preserving proportion of time in states

 

 

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