What are the two types of narcolepsy?

Narcolepsy is classified into two primary categories, with Type 1 characterized by the presence of cataplexy and Type 2 lacking this symptom. Cataplexy refers to a sudden loss of muscle tone, often triggered by strong emotions such as laughter or excitement, leading to brief episodes of weakness or paralysis. The distinction between the two types is crucial for diagnosis and treatment options.

Type 2 narcolepsy, which does not involve cataplexy, is generally associated with excessive daytime sleepiness and may include other features such as sleep paralysis or hypnagogic hallucinations but lacks the defining characteristic of cataplexy. This classification helps to understand the varying presentations and intensity of narcolepsy symptoms, facilitating appropriate therapeutic interventions for patients.

The other options mischaracterize narcolepsy by associating it with symptoms that are not part of its primary classification system. Understanding the distinction between Type 1 and Type 2 narcolepsy is essential for recognizing how these presentations vary and how they impact clinical management.