Narcolepsy
topic
Narcolepsy is a chronic neurological disorder caused by the loss of hypothalamic orexin (hypocretin) neurons — producing excessive daytime sleepiness, sudden sleep attacks, cataplexy (sudden muscle weakness triggered by strong emotions), sleep paralysis, and hypnagogic hallucinations — resulting from autoimmune destruction of orexin-producing neurons, typically following an environmental trigger in genetically susceptible individuals.
Role
Narcolepsy is one of the most severely disabling and most chronically misdiagnosed sleep disorders — with an average diagnostic delay of 10 years in many healthcare systems, during which affected individuals are told they are lazy, depressed, or simply tired, and their condition is treated symptomatically with stimulants without identification of the underlying orexin deficiency. Understanding narcolepsy matters for the generalist not only as a diagnostic category to recognize but as one of the clearest demonstrations of the specific neurological basis of wakefulness — making the behavioral and environmental factors that modulate the same orexin system in healthy individuals more legible.