Brain Scans (image) University of California - Los Angeles Health Sciences Share Print E-Mail Caption The left image shows a normal brain scan and middle and right images show scans of pro football players from the study. The green and red colors demonstrate the higher level of tau protein found in the brain. Note the higher levels (more red and green) in the players' scans. Scans of the players in the study reflect differing levels of tau protein and follow a pattern of progression similar to the tau deposits that have been observed at autopsy in CTE cases. Credit UCLA Usage Restrictions None Share Print E-Mail 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.