Report to Diagnostic Services 15 minutes prior to your appointment.
Please bring your health card to your appointment.
Confirm your appointment 2 days prior. Unconfirmed appointments may
Phone: (807) 684-6000 ext. #4181
The EEG is used to help diagnose the presence and type of seizure disorder,
confusion, head injuries, brain tumors, infection, degenerative disease, and
metabolic disturbances that affect the brain. It is also used to evaluate sleep
disorders and to investigate periods of unconsciousness.
The brain cells communicate by producing tiny electrical impulses. In the EEG,
electrodes are placed on the scalp over multiple areas of the brain to detect
and record the electrical impulses within the brain. Certain abnormalities can
be detected by observing the characteristic pattern of the recorded brain waves.
This procedure does not “read the mind” or detect senility. The
test is performed by an EEG technician.
This test takes 1 - 1½ hours. The technician will apply between 16 and
22 flat metal discs (electrodes) in different positions on your scalp. The discs
are held in place with a sticky paste.
The electrodes are connected by wires to an amplifier and the recording machine.
The recording machine converts the electrical signals into a series of wavy
lines, which are visible to the technician on the monitor.
You will be asked to lie on your back on a stretcher. You will need to lie
still with your eyes closed because movement can alter the results.
You will be asked to do certain things during the recording such as breathe
deeply and rapidly for several minutes and look at a very bright flickering
light. Nothing will be felt during the procedure. The procedure is very safe.
Your hair must be clean and free from gels, mousse or hairspray. Little
or no makeup should be used, if possible.
Please avoid all foods containing caffeine for 8 hours before the test.
Please bring a list of your medications.
You may want to bring a hat to wear after the test since your hair will be
messy from the cream we apply for the test.
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