MEDLINEplus Health Information: Return to home page   A service of the National Library of Medicine: Go to NLM home page
Search     Advanced Search    Site Map    About MEDLINEplus    Home
Health Topics: conditions, diseases and wellness Drug Information: generic and brand name drugs Dictionaries: spellings and definitions of medical terms Directories: doctors, dentists and hospitals Other Resources: organizations, libraries, publications, MEDLINE

Medical Encyclopedia

Disease     Injury     Nutrition     Poison     Special     Surgery     Symptoms     Tests


Sleep studies
 
Overview   Risks   Results   

Polysomnogram

Alternative names:

polysomnography; rapid eye movement studies; sleep studies

How the test is performed:

Polysomnograms may be conducted in a sleep study center. You will lie on a bed in the test center. The test may be carried out during the night so that normal sleep patterns can be reproduced. Electrodes are placed on the scalp, the outer edge of the eyelids, and to the skin on the chin in preparation for the test. Characteristic patterns from the electrodes are recorded during wakefulness with the eyes closed and during sleep. The time taken to fall asleep is measured as well as the time to enter REM sleep. Sometimes the movements of a person during sleep are recorded by video camera.

How to prepare for the test:

Do not take any sleeping medication and do not drink alcohol or caffeine-containing beverages before the test.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

How the test will feel:

Electrodes will be placed on the skin and scalp. Monitors to record heart rate and respiratory rate (breathing) will be attached to the chest. Sometimes other test to determine breathing disorders during sleep are also performed.

Why the test is performed:

The test is performed for insomnia, excessive daytime sleepiness, obstructive sleep apnea, breathing difficulties during sleep, or behavior disturbances during sleep.


Adam

The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2000 adam.com, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Health Topics | Drug Information | Dictionaries | Directories | Other Resources