You know this test by its abbreviation - an EEG. It records the brain's electrical activity using highly sensitive monitoring equipment. The EEG helps physicians diagnose many neurological problems, ranging from common headaches and dizziness to seizure disorders, strokes and degenerative brain disease. It also determines the organic causes of children's psychiatric symptoms and disabilities.
Before the procedure, electrodes will be placed at measured intervals on your head. This isn't painful. We'll use a paste-like substance to apply the electrodes to your head. The test takes about 90 minutes. All you have to do is relax, remain still, and be comfortable.
During the test, we may ask you to take several deep breaths. We may show you a strobe light that flashes at different speeds. We may do both. These activities reveal different brain patterns that will help the diagnosis.
Your physician may want to observe brain patterns that occur during sleep. If that's the case, you may be asked to stay awake most of the night before your EEG appointment.
The Evoked Potential, also called an EP, records the electrical activity of the brain, spinal nerves or sensory receptors when we apply specific external stimulation. It may be a visual pattern that we'll ask you to watch or a small electrical current. The electrodes are applied to your head and other areas of your body. A computer records the responses to the stimulation. The responses are plotted on a graph for your physician to review.
EPs help evaluate neurological conditions, such as spinal-cord injuries, acoustic neuroma and optic neuritis. Here are some of the more common EPs.
Long-Term Epilepsy Monitoring
We simultaneously record an EEG and videotape a patient's behavior over longer periods of time.
This test helps diagnose patients with intermittent or infrequent disturbances. We perform these tests in the lab using special computers.