Saliva-based concussion test (IMAGE) Penn State Caption The first-ever saliva-based concussion test, developed by scientists at Penn State, Quadrant Biosciences and the State University of New York, is expected to be available in 2023. Credit Quadrant Biosciences Usage Restrictions Educational use only License Original 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.