Chapter 7 - Chapter 7 States of Consciousness Earn a point...

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Chapter 7: States of Consciousness Earn a point!!! P. 271-289 I. Waking Consciousness (read from above pages) II. Sleep and Dream (read from above pages) III. Hypnosis IV. Drugs & Consciousness V. Near-Death Experiences I. Waking Consciousness - Definition: our awareness of our environment and ourselves. It brings varied information to the surface, enabling us to reflect and plan - Conscious awareness enables us to exert voluntary control and to communicate our mental states to others, yet consciousness is but the tip of the information-processing iceberg - We process great deal of info outside of our awareness - We register and react to stimuli we don’t consciously perceive, we perform well-learned tasks automatically (typing keyboard), we change our attitudes and reconstruct our memories with no awareness of doing so, when we meet people we instantly and unconsciously react to their gender, age and appearance and then become aware of our response - Sergent & Dehaene: when reverberating brain activity among interconnected brain areas crosses a threshold of intensity, it triggers consciousness - Kosslyn & Koenig: suggest brain events are consciousness what a guitars individual notes are to a chord, consciousness emerges from the interactions of indidvuiual brain events - Libet: observed that we experience the chord an instant after all the notes are present, so consciousness is known to lag behind the brain events that evoke it – ex: when you move a wrist at will, you consciously experience the decision to move about .2s before the actual movement… so before you are aware of it, your brain seems headed toward your decision to move your wrist. . Therefore: consciousness sometimes arrives late to the decision making party - Conscious processing takes place in sequence, it’s relatively slow and has limited capacity but is skilled at solving novel problems - It’s like achieve executive whose many assistants automatically take care of routine business – hands and feet do the driving while mind is elsewhere II. Sleep and Dream A. The rhythm of Sleep - Circadian rhythm: the biological clock; regular bodily rhythms (temperature and wakefulness) that occur on a 24-hour cycle - recent evidence suggests that thinking is sharpest and memory most accurate when people are at their daily peak in circadian arousal - with age we tend to shift from being evening energized to being morning loving - transcontinental flright distrupts our circadian rhythm and we experience jet lag - bright light helps reset our biological clocks. Bright light in the morning facsilitates awakening )and protects against depression), bright light at night helps delay sleep
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- light tweaks the circadian clock by activating light sensitive retinal proteins, they trigger signals to the brain’s superachiamatic nnucleus ( a pair of pinhead seized clusters of 20000 cells that control the circadian clock) - it does that by causing the braine’s pineal gland to decrease or increase its production of
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Chapter 7 - Chapter 7 States of Consciousness Earn a point...

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