+Narcolepsy is a chronic [sleep](/wiki/sleep) [disorder](/wiki/disorder) marked by overwhelming daytime drowsiness and sudden attacks of sleep. It stems from the brain's inability to properly regulate sleep-wake cycles.
+## See also
+- [Cataplexy](/wiki/cataplexy)
+- [Hypersomnia](/wiki/hypersomnia)
+- [REM Sleep](/wiki/rem_sleep)
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