Overview of central disorders of hypersomnolence

Imran M. Ahmed, Winfred P. Wu, M. Billiard

Research output: Chapter in Book/Report/Conference proceedingChapter


Excessive sleepiness (or hypersomnolence) is characterized by an increased amount of sleep or an increased drive toward sleep during the wake period that makes a person unable to sustain wakefulness or alertness in situations where it is required. Central disorders of hypersomnolence are a group of disorders in which the primary complaint is excessive sleepiness not caused by disturbed nocturnal sleep or misaligned circadian rhythm whereas hypersomnias refer to specific disorders such as idiopathic hypersomnia. This article highlights the key symptoms, diagnostic criteria, pathophysiology, and treatment for the central disorders of hypersomnolence.

Original languageEnglish (US)
Title of host publicationThe Curated Reference Collection in Neuroscience and Biobehavioral Psychology
PublisherElsevier Science Ltd.
Number of pages8
ISBN (Electronic)9780128093245
StatePublished - Jan 1 2016


  • Cataplexy
  • Epidemiology
  • Hypersomnia
  • Hypersomnolence
  • Hypnagogic hallucinations
  • Hypnopompic hallucinations
  • Hypocretin
  • Idiopathic hypersomnia
  • Insufficient sleep syndrome
  • Kleine-Levin syndrome
  • Narcolepsy
  • Narcolepsy type 1
  • Narcolepsy type 2
  • Pathophysiology
  • Sleep paralysis

ASJC Scopus subject areas

  • General Medicine


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