Tau Tangles (image) University of South Florida (USF Innovation) Share Print E-Mail Caption Neurofibrillary tau tangles (stained red) are one of the two major brain lesions of Alzheimer's disease. Blue fluorescent stain (DAPI) depicts the nerve cell nuclei. Credit © USF Health, University of South Florida Usage Restrictions Please use with appropriate caption. 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.