PSY352SleepPrimer

PSY352SleepPrimer - ABNORMAL PSYCH Spring 2009 Dr Bradbury...

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ABNORMAL PSYCH Spring 2009 • Dr. Bradbury Final Exam Prep SLEEP PRIMER Basic Information You Should Know About Sleep
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2 Biological Rhythms and Sleep Changes in light trigger the suprachiasmatic nucleus or  SCN (a cluster of neurons in the hypothalamus) to decrease  the release of melatonin from the pineal gland in the  morning and increase melatonin at night. Artificial light  also affects the SCN. Melatonin is a hormone that encourages sleep. Illustration © Cynthia Turner 2003
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EEG Stages of Sleep (Figure adapted from Cartwright, 1978)
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4 Alpha: Awake but Relaxed Eyes closed, but awake - the brain slows down, shows  regular Alpah waves. Meditation produces alpha waves.
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5 During early, light sleep (stages 1-2) the brain shows a  pattern of activity called  theta waves.  Daydreaming also produces theta waves. Theta: Sleep Stages 1-2 Theta Waves
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6 Deep sleep (stages 3-4) is called Slow Wave sleep  because brain activity slows down and produces low,  slow  delta waves. Delta: Sleep Stages 3-4 Parasomnias like sleep terrors, sleepwalking, and sleep-talking occur during Delta wave sleep.
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PSY352SleepPrimer - ABNORMAL PSYCH Spring 2009 Dr Bradbury...

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