VNG Test

VNG stands for Videonystagmography, and it is a diagnostic test used to evaluate the function of the inner ear and the central nervous system pathways that control eye movements. The test helps assess balance and detect any abnormalities or disorders related to the vestibular system, which is responsible for maintaining balance and spatial orientation.

Here is an overview of how the VNG test is typically conducted:

1. Preparation:

   • Before the test, the individual is usually asked to refrain from certain medications that could affect the results.
   • It's advisable to wear comfortable clothing, and the test is often performed in a dark room to enhance the visibility of eye movements.

2. Equipment:

   • Video goggles: These are worn by the individual and contain infrared cameras that record eye movements.
   • A computer system: It analyzes and records eye movements during the test.

3. Test Components:

   • Spontaneous Nystagmus: The individual may be asked to look at a stationary target while wearing the video goggles to detect any involuntary eye movements.
   • Positional Testing: The person is moved into different head and body positions to assess how changes in position affect eye movements.
   • Caloric Testing: Warm and cold air or water may be introduced into the ear canal to stimulate the inner ear, causing eye movements. This assesses the responsiveness of the vestibular system.