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Number of Pages 5
This research paper: 5 pages in length. Normal stages of sleep occur in four incremental steps, with Stage I being the hazy period of transition between sleep and consciousness called presleep or drowsiness and lasts about ten minutes until the beginning of Stage II, which continues approximately fifteen minutes. Stage III brings about a high presence of delta activity as it prepares the brain for Stage IV, which begins about one and one-half hours after Stage I. Obvious changes take place as people move into the first forty-five minutes of the final stage of sleep as their physiological composition manifests in unstable EEG readings and the presence of REM, the rapid side-to-side flitting of eyes that indicates deep sleep. Bibliography lists 3 sources.
File: LM1_TLCsleepstg.rtf
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