AP PSYCHOLOGY

Detailed explanation-1: -Sleep terrors are a disorder of arousal, meaning they occur during N3 sleep, the deepest stage of non-rapid eye movement (NREM) sleep.

Detailed explanation-2: -Night terrors usually happen about 2 or 3 hours after a child falls asleep, when sleep moves from the deepest stage of non-REM sleep to lighter REM sleep. Usually this transition is a smooth one. But sometimes, a child becomes upset and frightened-and that fear reaction is a night terror.

Detailed explanation-3: -The cause is unknown but night terrors are often triggered by fever, lack of sleep or periods of emotional tension, stress or conflict. Night terrors are like nightmares, except that nightmares usually occur during rapid eye movement (REM) sleep and are most common in the early morning.

Detailed explanation-4: -Nightmares happen during REM sleep while sleep terrors happen during non-REM (NREM) sleep.

Detailed explanation-5: -Sleep terrors are a common childhood parasomnia characterized by episodes of extreme terror and panic that occur suddenly out of NREM, slow-wave sleep.