Deirdre Barrett, a dream researcher, mentions that nightmares predominantly occur during the REM phase of sleep, which is associated with active brain functions similar to wakefulness.

梦境研究者迪尔德丽·巴雷特 (Deirdre Barrett) 提到，噩梦主要发生在快速眼动睡眠阶段，该阶段与类似于清醒状态的活跃大脑功能有关。