Tau (IMAGE) UT Southwestern Medical Center Caption In the Alzheimer's affected brain, abnormal levels of the amyloid beta protein clump together to form plaques (seen in brown) that collect between neurons and disrupt cell function. A UT Southwestern study shows people with abnormal amyloid beta accumulation experienced slower brain degeneration if they exercised regularly for one year. Credit: National Institute on Aging, NIH Credit UTSW 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.