An electroencephalogram (EEG) records the electrical activity in the brain and helps identify abnormalities. Electrodes are pasted to your head in specific places, and wires are then connected from the electrodes to an EEG machine.
With Routine EEG, brain wave activity may show a pattern, which helps the physician determine whether or not you have epilepsy. Sharp waves support the diagnosis of epilepsy, and can help identify the type of epilepsy.
The procedure is safe and noninvasive, producing no pain nor risk of electric shock, and can last anywhere from 45 minutes to 2 hours.
While a routine EEG provides a small sample of brain activity, an ambulatory EEG offers a patient an opportunity for a broader sample of electrical activity in the brain. This can be useful of seizure waves occur in the brain only once every few hours, or if they happen during particular times of day.
An ambulatory EEG is an extended EEG occurring at home, and can capture both awake and sleeping brain wave activity.