Four-year old DeMarcus falls asleep shortly after his 8:30 p.m. bedtime. At about 9:45 he suddenly sits up in bed screaming but cannot recall why he screamed. DeMarcus is probably experiencing

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DeMarcus is likely experiencing a night terror, which is characterized by sudden arousal from sleep with a piercing scream or cry, accompanied by autonomic nervous system activity. Unlike nightmares, which occur during REM sleep, night terrors typically occur during non-REM sleep, and the individual often has no recollection of the event.

Four-Year Old DeMarcus Falls Asleep Shortly After His 8:30 P