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Unformatted text preview: waves. Consists of moderately slow waves interspersed with very slow, very large delta waves. Stage 4 Mostly delta waves Consists almost entirely of delta waves. REM Sleep Fast, small waves indicating intense brain activity Consist of fast, small waves similar to those from a person who is awake and alert. Sleep Thoughts vs. True Dreams If people have vivid, realistic dreams during REM sleep, why dont they act out those dreams, perhaps injuring themselves or others? During REM sleep most motor neurons are inhibited, producing a kind of paralysis that keeps people from hurting themselves during a dream. Purpose of Sleep What are the two main purposes of sleep? 1. It reduces our energy expenditures so that the bodys resources can be mobilized for tissue repairs and growth. 2. Important for the brains work of organizing and consolidating the memories of the days events....
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- Spring '10