Assertion: narcolepsy | /r/Synonym | orexin
Facets:
Source sentences:
text: Narcolepsy is often linked to a deficiency in the sleep-regulating brain chemical hypocretin, also known as orexin.
text: Narcolepsy is a central nervous system disorder characterized in many, but not all, by a deficiency in hypocretin, also known as orexin, a wake-promoting neurotransmitter.