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Created page with "==Definition and Overview== A '''nightmare''' is a disturbing dream that results in feelings of fear, terror, distress, or extreme anxiety. This phenomenon tends to occur in the rapid eye movement (REM) stage of sleep, when most of our dreaming takes place. Nightmares can be a response to real life events or stressors, or they may appear seemingly out of nowhere. Image:Detail-36005.jpg|thumb|center|A dark, eerie representation of a nig..."
