system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Pa of brain involved in narcolepsy
assistant
The correct answer is  Harrison's principles of internal medicine 17th edition *Recently several convergent lines of evidence suggest that hypothalamic neuropeptide hypocretin(orexin) is involved in the pathogenesis of narcolepsy.