Eva Hedlund (IMAGE) Karolinska Institutet Caption Eva Hedlund, docent at the Department of Neuroscience, Karolinska Institutet, Sweden. Credit Ulf Sirborn Usage Restrictions None 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.