Polysomnography (PSG)
A detailed sleep test in which you stay a night at a sleep centre while your brain waves, breathing, oxygen and heartbeat are recorded together.
A little more detail
The simultaneous recording of channels such as EEG, EOG, chin EMG, airflow, chest and abdominal respiratory effort, SpO2, ECG and leg EMG; it is usually done under the supervision of a sleep technologist. It is the gold standard test that measures sleep stages and respiratory events.
Source: Kushida CA, Littner MR, Morgenthaler T et al. Practice parameters for the indications for polysomnography and related procedures: an update for 2005. Sleep. 2005;28(4):499-523. doi:10.1093/sleep/28.4.499
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