About Your EEG

What is an EEG?

An electroencephalogram (EEG) is a test to detect problems in the electrical activity of the brain.

How the Test is Performed?

The technician will apply 26 flat metal disks (electrodes) in different positions on your head. The disks are held in place with a paste. The electrodes are connected by wires to the recording machine. You will need to lie still, on a bed, with your eyes closed because any movement can alter the results.  The test takes about an hour. You may be asked to do certain things during the recording, such as breathe deeply and rapidly for several minutes or look at a bright flashing light.

How the Test Will Feel?

This test causes no discomfort. Although having electrodes pasted onto your skin may feel strange, they only record activity and do not produce any sensation.

Why the Test is Performed?

EEG is used to help diagnose if you're having seizures and if so, what type. An EEG is also used to find the causes of confusion, and to evaluate head injuries, tumors, infections, degenerative diseases such as Alzheimer's disease, and abnormal changes in body chemistry that affect the brain.  It is also used to evaluate problems with sleep (sleep disorders) and to investigate periods of unconsciousness.

Your EEG will be read by one of our physician partners at Rappahannock Neurology Specialists.