Exploring Early Stage Alzheimer’s Disease (IMAGE) University of California - Davis Caption A dying neuron damaged by tau protein. Tau is involved in Alzheimer's disease and other dementias. A new model in nonhuman primates is opening the possibility of testing treatments before extensive brain cell death and dementia set in. Credit Danielle Beckman/UC Davis Usage Restrictions May be used with acknowledgement. License Original 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.