Cerebellum in a Human Brain (IMAGE) Duke University Caption The cerebellum, indicated by pointer, is the brain within the brain or the tiny brain. It contains half of the brain's neurons, tightly packed. Credit Dan Vahaba, Duke University Usage Restrictions none 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.