An electroencephalogram records spontaneous electrical activity generated from the brain. The ambulatory electroencephalogram allows study of the electrical activity of the brain for 24, 48, or 72 hours.
Approximately 21 disc electrodes are glued to the scalp. Two EKG electrodes are placed on the chest to record the heart rate simultaneously with the EEG. You go home with the glued electrodes on your scalp and a recording device attached. The electrodes will remain attached for 24, 48, or 72 hours, depending on the length of the recording. The electrodes are connected to a portable computer carried in a portable pouch attached to a shoulder strap carried with you. You will keep a log of your activities and any symptoms that occur. You may maintain your usual daily routine. Strenuous physical activity should be avoided to prevent the electrodes from becoming loose. Continue to take all of your normal medications. You may go to work while the recording is being obtained. You will replace two AA batteries (provided) inside the portable computer at 24 and 48 hours if the recording goes for 48 or 72 hours. More specific instructions on the ambulatory electroencephalogram will be provided when the test is being performed.