At Regional Neurological Associates, we use state of the art Videonystagmography (VNG) technologies for testing inner ear and central motor functions.
The test entails using goggles, video cameras and the electrodes to measure eye movements to evaluate signs of vestibular dysfunction or neurological problems.
VNG testing is used to determine if a vestibular (inner ear) disease may be causing a balance or dizziness problem. These tests are designed to document a person’s ability to follow visual objects with their eyes and how well the eyes respond to information from the vestibular system.
Generally, these tests are performed in a room that is dark or with low lighting. Appointments typically last between 30 -45 minutes.
There are 4 main parts to a VNG test:
1.Ocular Mobility
You will be asked to have your eyes follow objects that jump from place to place, stand still, or move smoothly. The technician will be looking for any slowness or inaccuracies in your ability to follow visual targets.
2. Optokinetic Nystagmus
You will be asked to view a large, continuously moving visual image to see if your eyes can appropriately track these movements. Like the ocular mobility tests, the technician will be looking for any slowness or inaccuracies in your ability to follow visual targets.
3. Positional Nystagmus
The technician will move your head and body into various positions to make sure that there are no inappropriate eye movements (nystagmus), when your head is in different positions. This test is looking at your inner ear system and the condition of the endolymph fluid in your semi-circular canals.
4. Caloric Testing
The technician will stimulate both of your inner ears (one at a time) with warm and then cold air and uses these changes in temperature within the ear canal to stimulate part of the vestibular system. This test will confirm that your vestibular system for each ear is working and responding to stimulation.
