Narcolepsy is a sleep disorder that features excessive daytime sleep .In a tycpial sleep stages. This is when REM sleep occurs. It takes around 60–90 minutes to reach the stage of REM cycle, a person will first enter the early stage of sleep, then the deeper sleep sleep.
For people with narcolepsy, however, REM sleep occurs
Tests will show that the person is almost entirely missing a neurotransmitter known as hypocretin. This may occur after an infection triggers an autoimmune condition.