Electroencephalogram (EEG) is a test to measure electric brain activity to detect brain anomalies. EEG is also called a Brainwave test. This test is able to show the symptoms of epilepsy and Alzheimer’s. Some of the other conditions for which doctors may want to perform an EEG include head injury, brain tumor, encephalitis, stroke, or sleep disorders. Awal Bros Hospital provides EEG facilities to give an accurate diagnosis so that therapy can be performed earlier.

During the test, you will be asked to recline or lie down with your eyes closed for most of the test, and to stay as still and relaxed as possible. Small sensors (usually between 16 and 25 electrodes) are attached to the scalp, over different areas of your brain, to pick up the electrical signals produced when brain cells send messages to each other. These signals are recorded by a machine and are looked at by a doctor later to see if they are unusual. The test itself will take about 30-60 minutes. Placing the electrodes usually takes 20 minutes, but can take up to an hour, so the entire procedure may take about one to 2 hours.

The EEG procedure is painless, comfortable and generally very safe. However, you may feel lightheaded and notice a tingling in your lips and fingers for a few minutes during the hyperventilation part of the test. Some people develop a mild rash where the electrodes were attached.

Electroencephalogram Preparation

Wash your hair on the day of the test or the night before, but do not use any hair conditioner, hair spray, or styling gel. Avoid eating or drinking caffeinated beverages for 6 to 8 hours before the test. Consult with your doctor about the medications you take before the test. Some people may need to take a sedative to help them sleep during the test.