Videonystagmography

Videonystagmography (pronounced: vi-deo-nys-tag-mog-raphy) is a diagnostic test used to evaluate issues related to dizziness and balance disorders. The term is derived from the Greek words "video" meaning "to see", "nystagmus" meaning "involuntary eye movement", and "graphy" meaning "to write".

Overview

Videonystagmography involves the use of a special pair of goggles equipped with infrared cameras to monitor and record eye movements. The test is often used to determine the cause of vertigo, unsteadiness, or balance disturbances, and can help identify if the cause is peripheral (related to the inner ear) or central (related to the brain).

Procedure

During the test, the patient is asked to follow visual targets with their eyes, and the goggles record the eye movements. The patient may also undergo a series of positional and movement tests, such as being moved from a sitting to a lying position, or having their head turned to one side. In some cases, the ear canals may be stimulated with warm or cool air or water to provoke vestibular responses.

Interpretation

The results of the test are interpreted by a neurologist or otolaryngologist, who will look for abnormal eye movements or responses to the positional changes or ear canal stimulation. These could indicate a problem with the vestibular system in the inner ear or with the brain's ability to process balance and spatial information.

Related Terms

• Nystagmus
• Vestibular system
• Vertigo
• Balance disorder
• Neurology
• Otolaryngology

External links

• Medical encyclopedia article on Videonystagmography
• Wikipedia's article - Videonystagmography

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