About Our Practice

Polysomnography (PSG) is a test usually performed at night and is used to diagnose many different sleep disorders.  Keep in mind that the measuring devices are not painful and no needles are involved.

PSG measures the following

EEG (electroencephalograph):  monitors brain waves to help determine your stage of sleep.

EOG (electrooculograph):  monitors eye movements.

EMG (electromygraph):  monitors limb movements and chin activity.

ECG (electrocardiograph):  measures heart rate and rhythm.

Sensors called thermocouples or pressure catheters are used to monitor breathing from the nose and mouth.

Belts placed around the chest and abdomen measure respiratory effort.

Oxygen is monitored by a finger probe that clips to the finger.

Click this link for more information on what to expect during a PSG in our Sleep Center and how to prepare for a PSG.