Nightmare Disorder is the first Parasomnia
described by the psychiatrist's bible, the DSM-IV.
To be a disorder, rather than simply a nightmare or a series of nightmares,
the sufferer must experience significant impairment in personal, occupational
or social functioning as a result of the symptoms. The age distribution
of the disorder is similar to that of nightmares in general - it occurs
most often in young children (typically ages 3-5), though it can occur or
continue into adolescence or adulthood, and girls are generally more likely
to experience the symptoms. The most frequent and notable symptoms of Nightmare
disorder are that the sufferer is awakened repeatedly (on successive nights)
by the frightening aspects of the dreams they have, they are able to describe
these dreams in detail, and it is usually difficult for them to return to
sleep after having been thus awakened. Due to the lack of sleep generally
noted with Nightmare Disorder, sufferers are often irritable and exhibit
signs of sleep depravation (daytime sleepiness and poor concentration).
The frequent and repetitive nature of the frightening dreams may also trigger
or worsen other mental illnesses such as depression or anxiety disorders.
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