Microscopic Image of the Hippocampus of the Brain of Untreated Animals Who Had Access to Training (image) Max Delbrück Center for Molecular Medicine in the Helmholtz Association Share Print E-Mail Caption With access to a running wheel, many new cells formed in the hippocampus of untreated mice (marked red). Credit Image: Susanne Wolf/MDC. Usage Restrictions None 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.