Polysomnography

Polysomnography (PSG) is a study of sleep cycles and sleep behavior. It is usually done in a sleep center overnight. This study involves observing a person at sleep while charting brain waves and other bodily functions.

  • Call Your Doctor

    There should not be side effects or complications from the study. Call your doctor if you have any concerns.

    In case of an emergency, call for medical help right away.

  • Definition

    Polysomnography (PSG) is a study of sleep cycles and sleep behavior. It is usually done in a sleep center overnight. This study involves observing a person at sleep while charting brain waves and other bodily functions.

  • What to Expect

  • Reasons for Test

    This study can evaluate sleeping problems, such as:


    • Trouble falling or staying asleep—insomnia

    • Breathing that stops during sleep—apnea

    • A problem with falling asleep suddenly during the day—narcolepsy
    • Nightmares and sleepwalking
    • Problems with arm or leg movement during sleep

  • Possible Complications

    There are no major complications associated with this procedure.