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Sleep patterns in the young and aged
Sleep patterns in the young and aged


Definition:

Idiopathic hypersomnia 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).



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:

Other causes of excessive sleepiness include:



Symptoms:

Symptoms often develop slowly during adoescence or young adulthood. They include:

  • Daytime naps that do not relieve drowsiness
  • Difficulty waking from a long sleep -- may feel confused or disoriented
  • Increased need for sleep during the day -- even while at work, or during a meal or conversation
  • 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.

Cataplexy -- suddenly falling asleep or losing muscle control -- which is part of narcolepsy, is NOT a symptom of idiopathic hypersomnia.



Signs and tests:

The health care provider will take a detailed sleep history. Tests may include:

  • Multiple-sleep latency test
  • Sleep study (polysomnography, done to identify other sleep disorders)

A psychiatric evaluation for atypical depression may also be done.



Treatment:

Idiopathic hypersomnia is usually treated with stimulant medications such as amphetamine, methylphenidate, and modafinil. These drugs may not work as well for this condition as they do for narcolepsy.

Important lifestyle changes that can help ease symptoms and prevent injury include:

  • Avoiding alcohol
  • Avoiding operating motor vehicles or using dangerous equipment
  • Avoiding working at night or social activities that delay bedtime


Support Groups:



Expectations (prognosis):



Complications:



Calling your health care provider:



Prevention:



References: Consens FB, Chervin RD. Sleep Disorders. In: Goetz, CG, ed. Textbook of Clinical Neurology. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2007: chap 54.


Review Date: 5/11/2009
Reviewed By: Andrew Schriber, MD, FCCP. Specialist in Pulmonary, Critical Care, and Sleep Medicine, Virtua Memorial Hospital, Mount Holly, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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