nightmares refer to a form of parasomnia that occurs during REM sleep and is characterized by repeated awakenings with detailed recall of extended and extremely frightening dreams, usually involving threats to survival, security, or self -esteem.

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Nightmare at psychology-glossary.com■■■■
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Sleepwalking at psychology-glossary.com■■■■
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Rapid eye movement sleep at psychology-glossary.com■■■
Rapid eye movement sleep also known as REM is a stage of sleep that accounts for approximately two (2) . . . Read More
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