Lecture 10 - Lecture 10 Consciousness sleep and hypnosis...

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Lecture 10 Consciousness, sleep and hypnosis Qualia= subjective experience of perceiving oneself Being aware of one’s thinking Brain activity and consciousness are related Brain activity is brain waves- action potentials. Declining action potential= decline in level of consciousness Not all neurological activities are conscious: e.g. reflexes (that originate in spinal cord) Difference Unconscious and conscious - there is some kind of threshold Descartes: “I think, therefore I am” In human, there is readiness potential - increase in level of activity in motor cortex (precentral gyrus- in frontal lobe) There are events in the brain that indicate that we’re conscious Brain damage- clue about consciousness and unconsciousness Spatial neglect= hemi-neglect (of left half of space; right hemisphere) and blindsight- provide evidence for unconsciousness Blindsight- people who have damage in both occipital lobes; then the person is blind; yet they can see There are parts dedicated to visual processing Hemi-neglect examples: they’d neglect the left side… Burning House Example: they are conscious, but are unable to express it verbally; implicit memory works Sleep and Dreams Sleep- what is the purpose?
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  • Spring '08
  • Zaidel
  • Consciousness, brain damage, Circadian rhythm, suprachiasmatic nucleus, sleep REM sleep

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