What is a sleep study?


A specialised way to monitor many of your body's physiological processes while you are asleep. Tiny sensors are applied to the skin of your scalp, face, chest, fingers and legs. While you are asleep, testing measures your brain waves, eye movements, muscle activity, breathing, snoring, oxygen levels, heart rhythm, body position and leg movements

While you are asleep, testing measures your:

  • brain waves
  • eye movements
  • muscle activity
  • breathing
  • snoring
  • oxygen levels
  • heart rhythm
  • body position
  • leg movements


The sensors used to perform your sleep study are non-invasive and do not hurt.

There is sometimes mild, temporary skin irritation from rubbing the skin when attaching electrodes. Significant discomfort is very unusual.

Sleep studies allow many complex medical disturbances that occur during sleep to be investigated. Many of these medical conditions can cause disrupted sleep, daytime tiredness, problems with memory or concentration, and serious risk to your health.


Your comfort and safety throughout the night, and the quality of the information we record, are ensured by having trained staff guide you on how to properly set up your sleep test equipment.


The following physiological processes are routinely measured during a diagnostic PSG:

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