Thursday, December 18, 2014

Idiopathic hypersomnia

Table of Contents

Definition

Idiopathic hypersomnia is sleeping too much (hypersomnia) without an obvious cause. It is different from narcolepsy, because idiopathic hypersomnia does not involve suddenly falling asleep or losing muscle control due to strong emotions (cataplexy).


Alternative Names

Hypersomnia - idiopathic; Drowsiness - idiopathic; Somnolence - idiopathic


Causes, incidence, and risk factors

The usual approach is to consider other potential causes of excessive daytime sleepiness.

Other sleep disorders that may cause daytime sleepiness include:

  • Isolated sleep paralysis
  • Narcolepsy
  • Obstructive sleep apnea
  • Restless leg syndrome

Other causes of excessive sleepiness include:

  • Atypical depression
  • Certain medications
  • Drug and alcohol use
  • Low thyroid function (hypothyroidism)
  • Previous head injury


Review Date: 06/10/2011
Reviewed By: Denis Hadjiliadis, MD, Assistant Professor of Medicine, Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)