NLM Logo

Idiopathic Hypersomnia MeSH Descriptor Data 2023

MeSH Heading
Idiopathic Hypersomnia
Tree Number(s)
Unique ID
RDF Unique Identifier
Scope Note
A sleep disorder of central nervous system origin characterized by prolonged nocturnal sleep and periods of daytime drowsiness. Affected individuals experience difficulty with awakening in the morning and may have associated sleep drunkenness, automatic behaviors, and memory disturbances. This condition differs from narcolepsy in that daytime sleep periods are longer, there is no association with CATAPLEXY, and the multiple sleep latency onset test does not record sleep-onset rapid eye movement sleep. (From Chokroverty, Sleep Disorders Medicine, 1994, pp319-20; Psychiatry Clin Neurosci 1998 Apr:52(2):125-129)
Entry Term(s)
Hypersomnolence, CNS, Idiopathic
Hypersomnolence, Idiopathic
Idiopathic CNS Hypersomnolence
Idiopathic Central Nervous System Hypersomnolence
Previous Indexing
Disorders of Excessive Somnolence (1975-1999)
Public MeSH Note
2020; see Hypersomnolence, Idiopathic 2000-2019
History Note
2020; was Hypersomnolence, Idiopathic 2000-2019
Date Established
Date of Entry
Revision Date
Idiopathic Hypersomnia Preferred
page delivered in 0.297s