Bookshelf Landmark in Virtual Maze (IMAGE) Washington University in St. Louis Caption Participants in this Alzheimer's disease study used a joystick to navigate a virtual maze and locate landmarks, such as this bookcase. Credit Courtesy of Denise Head Usage Restrictions None 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.