Skip Navigation LinksTrillium Health Partners > Patient Services > Cardiopulmonary Services > Neurology Diagnostics

 Neurology Diagnostics

Services Include:

  • Electromyography (EMG) with Neurologist consultation
  • Nerve Conduction Studies with Neurologist consultation
  • Electroencephalograph (EEG)

Electromyography and Nerve Conduction Studies

A referral must be faxed to the department prior to appointment scheduling to Fax # 905-813-4046. To reach us our phone number is 905-813-1100 ext. 4082.


  • To evaluate the status of peripheral neuromuscular system
  • To evaluate symptoms such as numbness, tingling and weakness

The Test:

During a Nerve Conduction Test, which is performed by a technologist, nerves are stimulated by applying electrical currents to the surface of the skin. The time relationship between stimulus and the response is displayed, measured and recorded. Electromyography is performed by a neurologist and may cause mild discomfort, as the neurologist will insert a small needle into a muscle. The Electromyography uses a visual and an auditory signal to detect abnormalities in the peripheral neuromuscular system.


Do not wear any lotion anywhere on your body on the day of the test.

Electroencephalograph (EEG)

A referral is required for this test and can be faxed to 905-813-4046. To reach us our phone number is 905-813-1100 ext. 4082.


  • To record and interpret the electrical activity produced by the brain.
  • To determine brain function
  • To monitor for seizure activity

The Test:

Non-invasive electrodes are applied to your scalp while you are lying down. In a routine test 20 minutes of brain activity is recorded. You will be asked to perform 3 minutes of hyperventilation. Your brain’s response to a flash strobe light may also be evaluated. A sleep deprived study requires that you stay awake for 12 hours prior for a minimum 30 minute EEG study in addition to the procedures done in a routine study.

Preparation for Routine EEG:

Ensure that you have clean hair with no gels or hairsprays; bring a complete list of medication. This test takes 45 to 60 minutes. Arrive 20 minutes earlier.

Preparation for Sleep EEG:

This test is usually done in the early morning at 7:00 or 8:30am and the recording will be done while you are falling asleep. You are required to stay awake from 2am, to fast and not drink any coffee, tea or any other product containing caffeine. For children they are required to stay awake after midnight for a successful study, be sure to bring milk or juice bottles, favorite blanket and toys for your child. Make sure the child does not sleep prior to the test or in the car on the way to the hospital. This test will take 1 to 1 ½ hours.