What is an EEG?

Electroencephalography (EEG) is a diagnostic test that measures electrical activity in the brain using small, flat metal discs known as electrodes that are attached to an electroencephalogram machine. The electrical activity—the way in which the brain cells communicate—appear as wavy lines on a recording.

What is an EEG used for?

EEG is one of the main tests used to confirm a diagnosis of epilepsy and for monitoring purposes to:

• Determine the type of seizure for the right course of treatment
• Distinguish epileptic seizures from other types of episodes, such as psychogenic epileptic seizures and other movement disorders
• Pinpoint where in the brain the abnormal activity is occurring
• View brain activity during surgery

What happens during an EEG?

Prior to the procedure, a technician attaches electrodes to the scalp following the American Clinical Neurophysiology guidelines, using a special paste that is conductive and washable.

Once the electrodes are in place, the patient is asked to remain still and may be asked to perform certain tasks, such as breathing slowly or quickly, or observing certain visual stimuli (e.g., flashing lights, a patterned board, etc.). The brain’s reactions to these tasks are recorded on the electroencephalogram machine. The procedure takes approximately one hour to complete.

For more information on EEG monitoring, contact us today.