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What Types of Tests Will be Performed?
There are 3 main parts to the videonystagmography (VNG) test:
1. Ocular Motor Tests
During ocular motor testing, patients are asked to follow objects with their eyes while being certain to keep their head still. The audiologist will be looking for any. The presence of slowness or inaccuracies in the patient’s ability to follow visual targets may indicate a neurological problem or possibly a problem in the pathway connecting the vestibular system to the brain.
2. Positional Tests
The audiologist will move a patient’s head and body into various positions to evaluate inappropriate eye movements which may be evoked. This test is looking at your inner ear system and the condition of the endolymph fluid in your semi-circular canals. The audiologist is verifying that small calcium carbonate particles called otoconia are not suspended in the fluid and causing a disturbance to the flow of the fluid.
3. Caloric Testing
The audiologist will stimulate both of your inner ears (one at a time) with warm and then cold air. They will be monitoring the movements of your eyes using goggles to make sure that both of your ears can sense this stimulation. This test will confirm that your vestibular system for each ear is working and responding to stimulation. This test in the only test available that can decipher between a unilateral and bilateral loss.
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