VESTIBULAR AUTOROTATION TEST (VAT)
The Vestibular Autorotation Test is a tool used to assess the integrity of a patient’s Vestibular-Ocular Reflex (VOR). The Vestibular-Ocular Reflex functions to ensure that your eyes move in the same speed and direction as your head to ensure that you can track or follow objects in your sight line. Impairment of the vestibular-ocular reflex (VOR) may result in chronic dizziness and imbalance. The VAT is a high frequency, active head rotation (AHR) test to subjectively evaluate the VOR and its function. Patients wear a lightweight head-strap with a velocity sensor on the back. They follow instructions to shake their head, first side-to-side, and then up-and-down. Conventional electro-olfactogram electrodes placed around the eyes measure patients' eye movements. This test is available if necessary, but not required in a majority of our balance assessments.
Patient Risks and Preparation
The greatest risk involved with VAT testing is the likelihood of increased nausea or dizziness through specific portions of the test or at the conclusion of the test. For this reason we typically suggest that a friend or family member accompany the patient to ensure their safety returning home after the test.
There may be other risks depending upon your specific medical condition. Be sure to discuss any concerns with your physician prior to the procedure.