A polysomnogram (PSG) is a comprehensive and non-invasive recording of multiple physiologic parameters related to sleep and health.  Below are a few terms you might hear related to the sensors that are used.

•    PSG = Polysomnogram
•    EEG = Brain Waves
•    EOG = Eye Movements
•    EMG = Muscle Activity
•    ECG = Heart Rate

    
Sleep Testing also includes other sensors to record:

•    Nasal Airflow and snoring with a nasal cannula
•    Respiratory Movement with soft stretchy bands over the chest and abdomen
•    Body Position
•    Oxygen Saturation
•    Video Recording of Movements and Behavior

The sensors are connected to a recording device (called a head-box) located on the nightstand with very thin colorful plastic coated wires.  The wires are all long enough so you can comfortably change positions during the night.