PSY 111 Chapter Notes - Chapter 5: Excessive Daytime Sleepiness, Non-Rapid Eye Movement Sleep, Sleep Deprivation
7 Aug 2013
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Document Summary
Consciousness a person s awareness of feelings, sensations, and thoughts at a given moment. Persistent vegetative state damage to thalamus or its cortical connections causes wakefulness without awareness. Type and percentage of brain waves a patient exhibits. Percentage of isoelectric activity (no brain activity) as anesthetic depth increases. Circadian rhythms [circa=about, dies=day] internal biological changes that occur on a daily schedule. Mostly light and dark (registered in part by scn) and melatonin. Body temperature: our core body temperature changes about 2-4 degrees in 24 hours. Chronobiology science of investigating and applying information about biological rhythms. ~20,000 neurons located in the hypothalamus (just above the optic chiasm). Receives information about light and dark and serves as a central internal clock. Problems with circadian rhythms: jet lag temporary maladjustment that occurs when a change of time zones causes biological rhythms to be out of step with local time, shift work.
