![]() ![]() Your doctor may recommend PSG if he or she suspects you have: Sleep disorders can disturb this sleep process. You normally go through multiple sleep cycles a night, cycling between NREM and REM sleep in about 90 minutes. After an hour or two of NREM sleep, your brain activity picks up again, and Rapid Eye Movement (REM) sleep begins. Your eyes don’t move back and forth rapidly during NREM, in contrast to later stages of sleep. During this stage, your brain waves, as recorded by electroencephalography (EEG), slow down considerably. The normal process of falling asleep begins with a sleep stage called Non-Rapid Eye Movement (NREM) sleep. PSG monitors your sleep stages and cycles to identify if or when your sleep patterns are disrupted and why. In addition to helping diagnose sleep disorders, PSG may be used to help adjust your treatment plan if you have already been diagnosed with a sleep disorder. ![]() Sleep disorders have also been linked to an increased risk of injury, such as having a fall and road traffic accidents, can cause a poor quality of life, and need to be properly diagnosed and treated. The test is important because untreated sleep disorders can contribute to a number of medical conditions including heart disease, high blood pressure and stroke. This test can help your doctor to find out whether you have a sleep disorder and how severe it is. It measures how well you sleep by recording your brain waves, the oxygen level in your blood, heart rate and breathing, as well as eye and leg movements during the study. Polysomnography (PSG) is a test used to diagnose sleep disorders, usually done at the hospital. ![]()
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