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Diseases

Genetic and Rare Diseases Information Center (GARD)

Idiopathic hypersomnia


Other Names for this Disease
  • Idiopathic hypersomnolence
  • Primary hypersomnia
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Overview

Idiopathic hypersomnolence is excessive sleeping (hypersomnia) without an obvious cause. It is different from narcolepsy in that idiopathic hypersomnia does not involve suddenly falling asleep or losing muscle control associated with strong emotions (cataplexy). Symptoms often develop slowly during adolescence or young adulthood and may include daytime naps that do not relieve drowsiness, difficulty waking from a long sleep, increased need for sleep during the day, and increased sleep time (up to 14 - 18 hours per day). Other symptoms may include anxiety, feeling irritated, low energy, restlessness, slow thinking or speech, loss of appetite, and memory difficulty.[1]

Last updated: 8/4/2010

References

  1. Schriber A. Idiopathic hypersomnia. MedlinePlus. 2009; http://www.nlm.nih.gov/medlineplus/ency/article/. Accessed 8/4/2010.
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Basic Information

  • MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.
  • The Merck Manuals Online Medical Library provides information on this condition for patients and caregivers. 

In Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • MeSH® (Medical Subject Headings) is a terminology tool used by the National Library of Medicine. Click on the link to view information on this topic.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Idiopathic hypersomnia. Click on the link to view a sample search on this topic.
Other Names for this Disease
  • Idiopathic hypersomnolence
  • Primary hypersomnia
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.