Brain sensor offers Alzheimer's answers (IMAGE) University of Virginia Health System Caption J. Julius Zhu, PhD, and colleagues have found an explanation for why Alzheimer's drugs have limited effectiveness and why patients get much worse after going off of them. Credit Dan Addison | UVA Communications Usage Restrictions May be used to accompany news coverage of the Alzheimer's discovery. All other uses require express written permission from UVA Health. 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.