Nightmares (cont.)
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When Do Nightmares Occur?
Sleep is divided into 2 stages: rapid eye movement (REM) and nonrapid eye movement (non-REM). REM and non-REM sleep alternate in 90- to 100-minute cycles. Most dreaming occurs during REM sleep. Nightmares usually occur in the middle of the night or early morning, when REM sleep and dreaming are more common.
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Sleep Disorder: Nightmares »
Sleep disorders occur in 35-45% of children aged 2-18 years.
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