Videonystagmography (VNG) Testing

Videonystagmography (VNG)

Videonystagmography (VNG) is a procedure used to evaluate the vestibular (balance portion of the inner ear system.  The VNG test involves the use of video goggles to measure quick eye jerks called nystagmus. These eye movements are recorded while a person completes a series of tests.

The tests are broken up into three sub-tests: visual (ocular motor), positional and caloric stimulation. The first section evaluates patients’ eye movements as they follow moving targets.  The second section evaluates eye movements in response to changes in head and body positions. The third evaluates eye movements following the introduction of warm and cool air to the ear.  The primary purpose of the VNG test is to attempt to determine the source of vertigo or dizziness and subsequent treatment recommendations.

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