Sleep can be divided into 2 phases — non-rapid eye movement (NREM) and rapid eye movement (REM) — and 4 stages that make a complete cycle ... More on RLS. Narcolepsy is a chronic central ...
Type 1 narcolepsy is the most common type, affecting 60% to 90% of narcoleptics, and is caused by a deficiency of hypocretin, a neurochemical that helps regulate the sleep-wake cycle. Hypocretins ...
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