EEG, ENG & Evoked Potentials

Electroencephalogram (EEG) is used to diagnose and evaluate neurologic diseases, such as seizures and epilepsy, and symtoms such as memory loss, dizziness,confusion, fainting, and a variety of other problems. The test measures the electrical activity of the brain waves, by painlessly pasting about 26 small electrodes over the head, and recording the brain's activity. This is done in our office, and then analyzed by our neurologists, at Neurology Associates of Fredericksburg. Additionally, for more complicated cases, a digital EEG device can be worn home, which continuously records from 24 to 72 hours of your brain activity(7 to 25,000 screens) to later be both visually and digitally analyzed. This can also include video recording.

Electronystagmogram (ENG) checks how well the eyes, inner ears, and brain work together to keep your balance. Common symptoms of disorder are dizziness, or vertigo, a sense of spinning. During ENG, electrodes are placed near the eyes to record eye movements at rest and in response to motion or temperature changes in the ear. These electrical potential changes are then analyzed by our neurologists, at Neurology Associates of Fredericksburg.

Evoked Potential Testing records the brain's response to visual, auditory, and limb stimuli. Visual evoked potentials test the visual pathways between the retina (eye) and the brain by presenting alternating checkerboard patterns. Brainstem auditory evoked potentials test the pathways between the ear and the brain by using headhones over the ears. Somatosensory Evoked Potentials test the pathways through the limbs and spine to the brain by stimulating nerves with small electrical pulses, usually felt as tingling sensations.