Anna Falk (IMAGE) Karolinska Institutet Caption This is Anna Falk, researcher at Karolinska Institutet's Department of Neuroscience. Credit Stefan Zimmerman Usage Restrictions The image may only be used in connection with articles about this study. 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.