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Revision as of 17:10, 19 November 2009 by Katherinefulmer (talk | contribs) (New page: REM -- rapid eye movement -- the type of sleep when we are thought to dream the most. People normally have 4 or 5 cycles into REM during the night, with each REM cycle getting longer than ...)
REM cycle
REM -- rapid eye movement -- the type of sleep when we are thought to dream the most. People normally have 4 or 5 cycles into REM during the night, with each REM cycle getting longer than the last one. First REM cycle usually happens about an hour and a half after a person goes to sleep and might last just 4 or 5 minutes.