Thioflavin-S Staining (IMAGE) Allen Institute Caption 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 Usage Restrictions Original format with proper caption and attribution. 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.