Tau (image) UT Southwestern Medical Center Share Print E-Mail 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 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.