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An electroencephalogram (EEG) lets a doctor see the electrical activity of your brain.
You will have small pads or patches attached to different places on your head. These are called electrodes. Wires connect the electrodes to a computer.
The computer records the activity of the brain. This looks like wavy lines on the computer screen or on paper.
The test is often used to diagnose epilepsy. It helps a doctor know what types of seizures are happening.
An EEG can also check brain activity in people with sleep disorders.
It can also help a doctor know why a person passed out (lost consciousness).
Watch closely for changes in your health, and be sure to contact your doctor or nurse call line if:
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
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Current as of: March 28, 2019
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine & Karin M. Lindholm DO - Neurology
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