Abstract: This invention relates to the field of screening for, identifying, diagnosing, and prognosing chronic traumatic encephalopathy (CTE). Specifically, this invention provides various biomarkers for this disease, and methods of using these biomarkers to correctly diagnose, prognose and predict those individuals who would develop CTE after suffering from mild traumatic brain injury. The invention also provides targets for drug development and basic research for CTE and preventative and therapeutic agents for CTE.