Brain Plaques (2 of 2) (image) Allen Institute Share Print E-Mail Caption This is a Thioflavin-S staining of a brain tissue sample from the Aging, Dementia and TBI study. Staining reveals amyloid plaques and neurofibrillary tangles associated with Alzheimer's disease. Credit Allen Institute for Brain Science 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.