The sleep attacks and paralysis of the sleep disorder narcolepsy appear to occur when NREM Stage 4 sleep intrudes into the waking state.

Question

Quizplus · Accepted Answer

Narcolepsy is characterized by the intrusion of REM (Rapid Eye Movement) sleep features into wakefulness, not NREM Stage 4 sleep. Symptoms such as sleep attacks and cataplexy (a form of paralysis) are associated with REM sleep characteristics, not NREM sleep.

The Sleep Attacks and Paralysis of the Sleep Disorder Narcolepsy