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The normal sleep cycle involves distinct stages, from light drowsiness to deep sleep. During rapid eye movement (REM) sleep, the eyes move quickly and vivid dreaming is most common. Each night there are several cycles of non-REM and REM sleep. Nig...
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Sleep terror disorder is defined as repeated temporary arousal from sleep, during which the affected person appears and acts extremely frightened.
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Night terrors are a sleep disorder characterized by anxiety episodes with extreme panic, often accompanied by screaming, flailing, fast breathing, and sweating and that usually occur within a few hours after going to sleep.
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Childhood night terrors are a parasomnia, or partial-sleep disorder, common in young children. They occur in the deepest stage of sleep and are characterized by an abrupt arousal, usually within the first hour of sleep. The child may sit bolt upri...
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