What defines Non-REM Sleep Arousal Disorder?

Non-REM Sleep Arousal Disorder is characterized by incomplete awakening from sleep, typically occurring during the first third of the sleep cycle. This disorder manifests as either sleepwalking or sleep terrors, which are episodes where the individual may exhibit behaviors associated with deep sleep while still being largely unaware of their surroundings.

During these episodes, the person may appear confused, disoriented, and unable to fully communicate or recall the events afterward. Unlike nightmares, which occur during REM sleep and are typically associated with vivid dreaming and awakenings, Non-REM Sleep Arousal Disorder involves a lack of full awakening, making it distinct from nightmares or other REM-related phenomena. Thus, the definition that highlights incomplete awakenings along with the specific behaviors of sleepwalking and sleep terrors accurately captures the essence of this sleep disorder.