Grid Cell (IMAGE) University of California - San Diego Caption Red dots signal the location of electrical impulses generated within this grid cell, which are needed for the brain to store information about the rat's physical environment. Credit UC San Diego 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.