The vestibular system is complex and responsible for many of the body’s functions. In order to narrow down the exact cause of dizziness, it is necessary to administer a variety of tests. These measure eye movements, head movements, hearing and more. They are used to determine whether symptoms of dizziness are caused by the balance system of the inner ear.
Vestibular testing is also helpful in determining whether additional diagnostic testing, such as an MRI, is needed in your unique case.
A battery of tests is administered in most cases, the most common being:
An infrared video camera attached to a pair of goggles. VNG tests usually consist of four parts:
- Evaluation of rapid eye movements
- Tracking tests to measure eye movements as they follow a visual target
- Positional test for measuring dizziness in response to different head positions
- Caloric test that measures responses to warm and cold water circulating through a tube in the ear canal
Vestibular Evoked Myogenic Potential (VEMP)
Used to determine whether the saccule (an inner ear organ) and vestibular nerves are functioning properly.
Video Head Impulse Test (vHIT)
An ear-specific test that detects a deficiency of the vestibular-ocular reflex (VOR) and abnormalities of the lateral anterior and posterior semi-circular canals.