Transmission of Tangles (image) University of Pennsylvania School of Medicine Share Print E-Mail Caption These are neurons filled with tangles (arrows) in medial region of hippocampus one month after injection of synthetic tau fibrils into the hippocampus. Scale = 50um. Credit Michiyo Iba, Ph.D., Perelman School of Medicine, University of Pennsylvania 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.