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The nightmares usually occur during the REM stage of sleep, and the person who experiences the nightmares typically remembers them well upon waking. [2] More specifically, nightmare disorder is a type of parasomnia , a subset of sleep disorders categorized by abnormal movement or behavior or verbal actions during sleep or shortly before or after.
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Nightmares can have physical causes such as sleeping in an uncomfortable position or having a fever, or psychological causes such as stress or anxiety. Eating before going to sleep, which triggers an increase in the body's metabolism and brain activity, can be a potential stimulus for nightmares.
In addition, nightmares appear ordinarily during REM sleep in contrast to night terrors, which occur in NREM sleep. [2] Finally, individuals with nightmares can wake up completely and easily and have clear and detailed memories of their dreams. [2] [30] A distinction between night terrors and epileptic seizure is required. [30]
These nightmares often involved scenarios of being attacked, trapped, crushed or falling. A participant from Ireland described their nightmares as horrific and graphic, involving scenes such as ...
What causes nightmares? There are a few things that can hike the likelihood of experiencing nightmares or trigger one. "Stress and sleep deprivation are two common ones that tend to go hand-in-hand.
A light kept constantly on during the night will also effectively ward off an Alp. A sentry may also be employed to wait and watch for the Alp to attack the helpless sleeper, the Alp may be driven away if caught by someone not under the Alp 's influence.
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