Brain Scan Images Showing Protein Tangles (IMAGE) Imperial College London Caption These scans show the amount of tau protein in the brains of patients who have suffered a traumatic brain injury. Red represents increased tau accumulation. Credit Imperial College London Usage Restrictions None 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.