Grid Cells Graphic (IMAGE) University of California - San Diego Caption The rat with the MEC lesion (right) shows a poor ability to remember the location of the resting platform (red dot). Credit UC San Diego School of Medicine Usage Restrictions use photo credit as directed. 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.