The Alzheimer's Test (image) University of Illinois at Urbana-Champaign Caption Researchers asked participants to study a circle divided into three patterned parts then pick an exact match from a series of 10 other circles. This task measures the performance of a part of the brain called the hippocampus, which has been shown to sustain damage in Alzheimer's disease. Credit Jim Monti Usage Restrictions Credit required: Jim Monti 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.