Beyond bedside testing: Objective functional assessments of the Vestibulo-Ocular Reflex (VOR)

10 - 30 mins
05 October 2022


This presentation from Michelle Petrak Ph.D. CCC-A, will introduce the concept of the Vestibulo-Ocular Reflex (VOR) and how deficits in this reflex can affect people. The bedside functional assessment of the VOR is also discussed, its benefits and short comings. Next Dr. Petrak looks at how adding computerized protocols can advance a clinic and improve these functional assessments. Particular attention is paid to the Computerized Dynamic Visual Acuity (DVA) test and the Computerized Gaze Stabilization Test (GST). Both of these tests can be performed on the VisualEyesTM system, and the results screen and interpretation are also discussed in this video. This video will introduce a clinician to the concepts they need to understand for creating effective rehabilitation strategies for patients suffering with dizziness and imbalance, especially related to deficits in the VOR.


Michelle Petrak
Michelle Petrak, Ph.D., is the Director of Clinical Audiology and Vestibular Research for Interacoustics. Her primary role is development and clinical validation of new technologies in the vestibular and balance areas. She is located in Chicago where she is a licensed private practice clinical audiologist at Northwest Speech and Hearing (NWSPH). Dr. Petrak received her doctorates in Electrophysiology (1992) and Biomolecular Electronics (1994) from Wayne State University and her Masters in Audiology in 1989. Her special areas of expertise include vestibular and balance assessments and management of the dizzy patient. Dr. Petrak is involved with new innovative product developments, clinical evaluations of new protocols, and publishing, teaching, and training on the management of patients with dizziness. She continues to lecture extensively nationally and internationally, and she has numerous articles published in the hearing industry journals. She also participates on the committees for several doctoral students as support for the research projects.

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Interacoustics - hearing and balance diagnosis and rehabilitation
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