Our Sleep Lab
Sleep Disorders
What is a Sleep Study?
SLEEPWELL Diagnostic and Treatment Center uses these diagnostic tools: The EEG or electroencephalogram is a major part of a sleep study. It measures and records four forms of brain wave activity - alpha, beta, delta and theta waves. Alpha waves are usually found during relaxed wakefulness, particularly when your eyes are closed. Theta waves are seen during the lighter sleep stages 1 and 2, while delta waves occur chiefly in deep sleep, the so-called "slow wave sleep" found in sleep stages 3 and 4. EMG or electromyogram: records muscle activity such as face twitches, teeth grinding, and leg movements. It also helps in determining the presence of REM stage sleep. The amount and duration of these activities provides the doctor important information about your sleep.
EOG or electroculogram: records eye movements. These movements are important in determining the different sleep stages, particularly REM stage sleep. The electrodes are usually placed on the outer aspect of your right eyebrow and along the outer aspect below or beneath your left eye. Nasal Airflow Sensor: records breath temperature, airflow, apnea and hypopnea events. A sensor is placed near your nose and mouth. Chest/Abdomen Belts: record breathing depth, apnea and hypopnea events. Elastic belts are placed around your chest and abdomen. Oximeter: records blood oxygen saturation. A band-aid like clip is placed on a finger. Video: records body positioning and movements. Snore Microphone: records snoring. An electrode is placed over your trachea, on your lower neck.
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A Sleep Study or Polysomnogram (PSG) is a multiple-component test, which electronically transmits and records specific physical activities while you sleep. The recordings become data, which will be "read" or analyzed by a qualified physician to determine whether or not you have a sleep disorder.