Neurons in the Hippocampus (image) Harvard Medical School Share Print E-Mail Caption Young neurons (pink), responsible for encoding new memories, must compete with mature neurons (green) to survive and integrate into the hippocampal circuit. Credit Photo courtesy of Kathleen McAvoy. Usage Restrictions With appropriate caption and credit. Share Print E-Mail 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.