A sleep disorder causing excessive sleeping, sleep attacks during any activity and hallucinations. A sufferer feels very sleepy during the day and may fall asleep at any time. Narcolepsy can be caused or triggered by lack of orexin, immune system problems, genetic inheritance, psychological stress, sudden changes in sleep schedules, head injuries or brain tumors.
Narcolepsy leads to a sudden loss of muscle control which can cause the patient to collapse, temporary disability to move or speak and nightmares.
- Abnormal and Excessive daytime sleeping and falling asleep during activity
- Waking up repeatedly throughout the night
- Sleep paralysis