Dirk Jancke, Ruhr-University Bochum (IMAGE) Ruhr-University Bochum Caption Dirk Jancke s Head of the Optical Imaging Lab at RUB. Credit RUB, Kramer Usage Restrictions The image may only be used in the context of the press release "How serotonin balances communication within the brain" from 7.4.2020. 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.