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Suddenly screaming in the middle of the night. Eyes open but unresponsive to calls. Up and walking around. And then, in the morning, no memory of any of it.
These are not nightmares. They are a distinct class of phenomena — Non-REM parasomnias: abnormal behaviors that occur during deep non-dreaming sleep stages, including night terrors and sleepwalking — that arise in the deep stages of sleep and operate through an entirely different physiological mechanism than dreaming. Understanding that difference is the starting point for knowing what a parent should actually do in the middle of the night.