psych 10-9 - October 9, 2007 Intro. to Psych. Sleep -we...

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October 9, 2007 Intro. to Psych. Sleep -we have internal alarm clock even when there is no night, no day, and no seasons -body’s day = 25 hours -newborns: random at first, sleep patterns by 26 weeks -in humans, circadian rhythms are synchronized by both daily and seasonal alterations in the light-dark cycle -influences: sleep, body temp, blood pressure, respiratory function, hormone secretion, and immune response -circadian rhythms are not modulated only by light but are also in part genetically controlled by circadian or clock -Sleep/Wake cycle: -wakefulness reflects the relative balance between the SCN circadian wake signal and homeostatic sleep load -when wake signal exceeds the sleep load, more likely to wake -scn (super chiasmic nuclei) – encouraging wakefulness/fighting sleep load -sleep load = biologic drive for sleep that increases with time (wakefulness) -homeostatic systems and sleep control systems within the hypothalamus are closely integrated -with sleep deprivation: increased body temperature, stimulated appetite, and an activated sympathetic nervous system (arousing)
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This note was uploaded on 04/23/2008 for the course PY 101 taught by Professor Schmautz during the Spring '08 term at Whitworth University.

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psych 10-9 - October 9, 2007 Intro. to Psych. Sleep -we...

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