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REM
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Before the discovery of REM (Rapid Eye Movement during dreaming) it was believed that there was just one kind of sleep state. In 1953 at the University of Chicago, Nathaniel Kleitman and his student Eugene Aserinsky found otherwise. (Aserinsky & Kleitman, 1953) Dr. Kleitman had been studying sleep difficulties in infants and wanted to explore the slow rolling eye movements that babies have at sleep onset. He had his student Aserinsky watch these movements of sleepy infants. What surprised Aserinsky and changed the notion of sleep forever, was the occasional occurrence of very rapid movements of the eyes at various times during the sleep cycle. Though the eyes remained closed, they moved just as if the child was awake and outside playing games. Aserinsky and Kleitman then monitored adults and found the same thing, and that these eye movements lasted anywhere from three to fifty-five minutes (Van De Castle, 1994).
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