This topic will help you learn about the Electroencephalogram (EEG) Test and how to prepare for it.
What is an electroencephalogram (EEG) test?
An EEG is a test that detects abnormalities in the brain waves or in the electrical activity of your brain. During the procedure, electrodes consisting of small metal discs with thin wires are attached to your scalp. The electrodes detect the tiny electrical charges produced by brain cell activity. The charges are amplified and appear as a graph on a computer screen, or as a recording that can be printed on paper. Your healthcare provider then interprets the reading.
When is an EEG performed?
1. An EEG is used to evaluate several types of brain disorders. When epilepsy is present, seizure activity will appear as rapid spiking waves on the EEG.
2. The test can also be used to diagnose other disorders that affect brain activity, such as Alzheimer’s disease, certain psychoses, and the sleep disorder narcolepsy.
3. It can also be used to assess the overall electrical activity of the brain (for example, to evaluate trauma, drug intoxication, or the extent of brain damage in coma patients).
4. An EEG may also be used to monitor blood flow in the brain during surgery.
There may be other reasons for your healthcare provider to recommend an EEG.
How do you prepare for an EEG?
- Tell your doctor about any medications you are taking.
- Tell your doctor about any health problems you have.
- Depending on your medical condition, your healthcare provider may ask you for other specific preparations.
- Wash your hair with shampoo, but do not use conditioner the night before the test. Do not use any hair care products such as hairsprays or gels.
