Glossary of Terms
orexin
Orexin is a neurotransmitter (chemical messenger) that plays a role in your:
- Sleep-wake regulation (control)
- Feeling awake during the daytime
- Appetite
- Energy levels
- Reward systems
- Thinking
- Mood
People who have narcolepsy type 1 have low orexin in their cerebrospinal fluid (CSF). Orexin is also called hypocretin.
Synonyms:
hypocretin