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A polysomnogram is a painless test that measures brain waves (EEG), eye movements (EOG), muscle activity from the chin and legs, and breathing. The breathing measurements include airflow from the nose and mouth, snoring (measured using a microphone taped to your neck) chest and abdominal movements and oxygen level (measured using a light that shines through the blood vessels in the finger).
The test determines sleep quality, sleep duration, leg movements during sleep, regularity of breathing during sleep and any unusual behaviors during sleep.
What to Expect
When you arrive at the laboratory, you will watch a film that describes breathing problems during sleep and their treatment. Then the technician will escort you to a comfortable, private bedroom. The room is equipped with a television set with cable. You will be asked to change into sleeping clothes (shorts or sweat pants and a loose top are best). The technician will attach the sensors to your head and body, and at approximately 10:30 p.m. to 11:30 p.m., you will be asked to go to sleep and the test will begin.
What to do Prior to the Polysomnogram