PSY 201 Consciousness

PSY 201 Consciousness - Consciousness What are you aware of...

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Click to edit Master subtitle style Consciousness
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n What are you aware of at this moment? n What is consciousness?
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Consciousness n Rene Descartes ¨ “I think, therefore I am.” n William James ¨ "the short duration of which we are immediately and incessantly sensible."
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A process n Private n Selective n Continuous, yet changing
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Self-consiousness n “Self” n Awareness of self and others
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Click to edit Master subtitle style Sleep and Dreaming
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What is the link between waking and dreaming? Why do we talk about sleep when we talk about consciousness? “Waking and dreaming are mirror images of one another which interact throughout our lives to create consciousness in the first place and to endow it with information for purposes of adaptation as we live out our lives.” (Hobson, Dreaming , pg 138)
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Circadian rhythms n 24 hour cycle of day and night n Body temperature rises in morning, peaks during the day, dips in early afternoon and drops again before bed. n Release of growth hormone during deep sleep
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Sleep stages n Every 90-100 minutes n 5 distinct sleep stages
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Measuring what happens during sleep n Electrodes on scalp measure brain waves n Electrodes on corner of eyes measure eye movements n Electrodes on chin measure muscle tension n EEG – recording of brain waves that vary in amplitude (height) and frequency (cycles per second)
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n Awake and alert ¨ beta waves n Awake and relaxed ¨ alpha waves
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Stage 1 n State do not know we are in until we leave it n Happens in unrecognized moment n Slowed breathing and irregular brain waves n Theta waves n Lasts up to 5 minutes
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Stage 2 n Relax more deeply begin 20 minutes of sleep n Rapid rhythmic brain wave activity known as sleep spindles
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Stage 3 and 4 n Slow-wave sleep n See delta waves n 30 minutes n Deep sleep, so it is hard to awaken
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n EEG recordings find auditory cortex responds to sound stimuli n Will wake up to baby’s cry or sound of name (Kutas, 1990) n When sleep walking and sleep talking is most likely to occur
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n 10 minutes n Brain waves rapid and saw-toothed n Heart rate rises, breathing rapid and irregular, every 30 seconds eyes dart around. n
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PSY 201 Consciousness - Consciousness What are you aware of...

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