Lecture 17 - 101 - F10 - consciousness

Lecture 17 - 101 - F10 - consciousness - Consciousness 17...

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Consciousness 17 – November 10, 2010
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Today Admin: exam grades up Consciousness: Hypnosis
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Consciousness Consciousness Consciousness - Consciousness: The subjective experience of perceiving one’s self and other entities. Brain activity and consciousness are inextricably related. Brain activity below a certain level is unconscious – therefore it is a threshold that once crossed produces a distinct sense of awareness.
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Circadian rhythm - cyclical changes that occur on a roughly 24-hr basis in many biological processes (e.g., hormone release, body temperature) Are you are morning person, or an evening person? Changes with age
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Figure 10.7 Figure 10.7: If tested early in the morning, older persons perform as well as younger people on memory tasks. As the day progresses, young people improve and older people deteriorate.
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Biology of Sleep Biology of Sleep Biological clock - the SCN (suprachiasmatic nucleus) of the hypothalamus, triggers our sense of fatigue (via increasing melatonin) Disruptions: Jet lag Night shifts Sleep needs: College students need 9 hours, usually get around 6
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Figure 10.9 Figure 10.9 The graveyard shift is aptly named. Serious industrial accidents usually occur at night, when workers are least alert. As in jet lag, the direction of change is critical. Moving forward—clockwise—is easier than going backward.
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Sleep saves energy
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Lecture 17 - 101 - F10 - consciousness - Consciousness 17...

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