Mariko Onodera and Jan Meyer (IMAGE) Heinrich-Heine University Duesseldorf Caption Mariko Onodera and Jan Meyer perform an experiment with potassium-sensitive microelectrodes in the Institute of Neurobiology at HHU. Credit HHU / Institute of Neurobiology 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.