psychnoteschapter4 - Psychology 2304 Professor G. Johnson...

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Psychology 2304 Professor G. Johnson Notes 1/29/08 Chapter 4 Consciousness and Its Variables I) Circadian Rhythm a. Internal clock, we actually run on a 24. b. Alters all during the day i. Most alert between 9:00 and 10:30 in the morning ii. Least alert around 3:00PM NOTE: all based upon getting 8 hours of sleep. c. Body temperature changes i. Lowest temperature is at 4:00 in the morning ii. . d. More sensitive to pain in the afternoon e. We secrete melatonin about 20 minutes after dark, or when we turn out the lights, this helps to make us sleepy. i. In Vegas, they keep the lights on all the time, so no matter where you are, you are less likely to get sleepy, you’ll be tired, but not sleepy. f. Internal clock in the brain, in the hypothalamus – suprachiasmatic nucleus. g. First device introduced to psychology is the electroencephalogram, EEG. i. Allows us to study sleep and study some disorders, like epilepsy. h. REM sleep lasts 90 minutes and you go through 4 every night. If you only sleep for an hour, it doesn’t count and it’s just a waste of time. You will feel well rested after 90 minutes of sleep, like if you take a nap. II)
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This note was uploaded on 04/14/2008 for the course PSYC 2301 taught by Professor Johnson during the Spring '08 term at Lone Star College System.

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psychnoteschapter4 - Psychology 2304 Professor G. Johnson...

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