Rhesus Macaque Foraging (IMAGE) University of Pennsylvania Caption Findings from Penn researcher Michael Platt and colleagues from Duke, Columbia and Yale universities reveal which region of the brain motivates animals, including humans and rhesus macaques (above), to make changes to their behavior. Credit Lauren Brent Usage Restrictions Must credit Lauren Brent as photographer. 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.