disorders of excessive somnolence
type: Concept
narrower: narcolepsy

narcolepsy
definition: A sleep disorder in which a person slips abruptly from an active, often emotional, waking state into several minutes of rapid eye movement (REM) sleep. Narcolepsy is associated with cataplexy, in which a sudden loss of muscle control results in an individual suddenly collapsing. [Source: The SAGE Glossary of the Social and Behavioral Sciences; Narcolepsy]
narrower: cataplexy
broader: disorders of excessive somnolence
type: Concept

cataplexy
type: Concept
broader: narcolepsy

concepts
type: Collection
type: ConceptGroup
member: narcolepsy