-According to this illustration,most episodes of REM sleep follow an episode of Stage ____________________ NREM sleep and are followed by ____________________ or an episode of Stage ____________________ NREM.

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-According to this illustration,most episodes of REM sleep follow an episode of Stage ____________________ NREM sleep and are followed by ____________________ or an episode of Stage ____________________ NREM.​

-According to This Illustration,most Episodes of REM Sleep Follow an Episode