EEG (Electroencephalogram)
What is the test?
An EEG measures the electrical activity of the brain, often referred to
as brain waves. This test is performed to see how the different parts of your
brain function. It records a graph of your brain waves which allows your
doctor to see how your brain functions.
What preparation is needed?
Freshly shampooed, dry hair with no hair spray, cream or oil on your
scalp is required for this test, as well as minimal or no make-up or cologne.
Barrettes, hairpins, etc. will be removed before testing.
If your test is scheduled as a sleep deprived EEG, you are to stay awake for a
minimum of 24 hours prior to the test. Do not have any caffeine (coffee, tea,
some sodas, & chocolate) after 12 midnight. For pediatric sleep deprived
tests, we recommend no more than 3 to 4 hours sleep the night before the test.
It is preferable that the 3 to 4 hours be from approximately 10 pm until 2 am,
then keep the child awake for the rest of the night.
Young children may need a sedative to help them relax before the test.
Where is the test done?
The Neurophysiology/EEG Department is located in the basement of the
Irving Unit at Crouse Hospital. After you have registered at the Advanced
Registration and Testing Center (room 112 of the Physician's Office Building),
you will be given specific written instructions on how to locate the department
in the hospital.
How is the test done?
The technologist will measure and mark you head with a wax pen to find
the precise places for several metal disks (electrodes), with a wire attached
to them, to be placed at different spots on your head for recording your brain
waves. Each spot will be cleansed with a special toothpaste-like substance and
the electrodes will be applied with a small amount of cream to hold them in
place. You will be made as comfortable as possible in a reclining chair or bed
and told to lie back with your eyes closed. The wires are then attached to a
recording machine which will measure and record the electrical activity of your
brain. You may be asked to breathe quickly and deeply for a few minutes.
The test is totally painless and takes about 1 1/2 hours.
What can I expect after the test?
The areas where electrodes were applied will be cleaned by the
Technologist, but will probably feel stiff or gritty until you have a chance to
rewash your hair. You may continue your normal activities.
For more information contact the EEG Department at
315/470-7722.
