Epilepsy and the Electroencephalogram (EEG)

EEG Introduction An EEG, or electroencephalogram, is a test that can help diagnose epilepsy. During an EEG, the electrical signals of the brain are recorded. This electrical activity is detected by electrodes, or sensors, placed on the patient's scalp and transmitted to a polygraph that records the activity. Electrical signals produced by the brain neurons are picked up by the electrodes and transmitted to a polygraph, where they produce separate graphs on moving paper using an ink writing pen or on a computer screen. How Do I Prepare For an EEG? To prepare for your EEG you should: Discuss any medications you are taking with your doctor prior to your procedure. Wash your hair the night before the test. Do not use hair cream, oils, or spray afterward.