Nightmares usually occur ____.
A) during the first half of the sleep cycle
B) during the second half of the sleep cycle
C) at the very beginning and the very end of the sleep cycle
D) at variable times throughout the sleep cycle

Question

Quizplus · Accepted Answer

Nightmares usually occur during the second half of the sleep cycle, during Rapid Eye Movement (REM) sleep. REM sleep occurs more frequently in the latter half of the sleep cycle, which is why nightmares are more common during this time.

Nightmares Usually Occur ____