What is a VNG?

VNG stands for videonystagmography. This type of evaluation is prescribed when a patient reports a history of vertigo/imbalance. At the Brainchild Institute, an audiologist performs the evaluation, which takes approximately 1-2 hours to complete. The testing evaluates the senses involved in balance including the inner ear (vestibular system), eye movements, proprioception (information from the muscles and joints), and the central nervous system. The examiner will then analyze the test data to determine how these senses work together to keep you on your feet.

Who needs a VNG evaluation?

Anyone who is experiencing vertigo/dizziness of unknown origin should have a VNG evaluation. The results from the VNG will provide the referring physician with information regarding the function of the vestibular system and how it interacts with the vision, proprioceptive, and central nervous system. From the information gained during the evaluation, the audiologist and referring physician will make recommendations for treatment and/or any further testing that may be necessary.

What should I expect during the evaluation?

It is simple and painless. The examiner will fit you with a pair of goggles used to measure and record your eye movements in response to a variety of tasks. If you have any neck or back pain, be sure to convey this to the examiner, as you will be asked to move your neck and body into some positions that may be uncomfortable for you. During some portions of the evaluation, it is completely normal to experience some dizziness, which usually only lasts seconds to a few minutes. It is best not to eat much before the evaluation, in case you also experience nausea.

Why can't I take my medications?

Certain medications and products containing alcohol may affect the VNG test results and should not be taken 48 hours before the evaluation. Life sustaining medications (heart medicine, insulin, blood pressure medication, etc.) are permissible. If you have any concerns about your medications, please be sure to discuss this with your doctor before undergoing the VNG testing.

Will I be able to drive home after the test?

We recommend that you have a friend or family member drive you home after the testing, just in case you feel a little uneasy. Most patients are perfectly, fine, however.

What else should I know about the VNG test?

Wear light, loose, comfortable clothing. Women should not wear eye make-up (no mascara or eye liner, especially) as the dark shades interfere with the camera's ability to focus on the pupil of the eyes.