Dementia Prevention Initiative (IMAGE) Florida Atlantic University Caption Catherine Robson, a nurse practitioner at FAU's Center for Comprehensive Brain Health, observes as Dr. James Galvin administers a test using a videonystagmography (VNG), which measures eye movements and is used as an early biomarker sign of Parkinson's disease and neurodegeneration. Credit Comprehensive Center for Brain Health Usage Restrictions Credit: Florida Atlantic University License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.