AP PSYCHOLOGY

Detailed explanation-1: -Night terrors are like nightmares, except that nightmares usually occur during rapid eye movement (REM) sleep and are most common in the early morning. Night terrors usually happen in the first half of the night.

Detailed explanation-2: -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-3: -Nightmares usually occur during the stage of sleep known as rapid eye movement (REM) sleep. The exact cause of nightmares is not known. Nightmares can be triggered by many factors, including: Stress or anxiety.

Detailed explanation-4: -It is during these REM episodes that brain structures in the default network exert influence, and it is during REM sleep that vividly recalled dreams occur most often. Nightmares tend to happen during the period of sleep when REM intervals lengthen; these usually occur halfway through slumber.

Detailed explanation-5: -Night terrors are caused by over-arousal of the central nervous system (CNS) during sleep. Sleep happens in several stages. We have dreams-including nightmares-during the rapid eye movement (REM) stage. Night terrors happen during deep non-REM sleep.