Brain (IMAGE) UT Southwestern Medical Center Caption The images compare a healthy brain (left) with a brain with severe Alzheimer's disease. A new study finds a traumatic brain injury may boost the risk of developing Alzheimer's disease earlier in life. Credit National Institute on Aging, National Institutes of Health 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.