May-Britt Moser and Edvard Moser (IMAGE) Norwegian University of Science and Technology Caption Nearly 20 years ago, the Mosers discovered the activity structure of single grid cells. What they found was a hexagonal grid pattern that functions as the brain’s metric and coordinate system for space. Today they uncovered the activity structure from the population of grid cells which can be visualized as the surface of a doughnut Credit Rita Elmkvist Nilsen, Norwegian University of Science and Technology's Kavli Institute for Systems Neuroscience Usage Restrictions Only for use in association with articles about this research 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.