Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany.|Departments of Neurobiology and Behavior, Physiology and Biophysics, University of California, Irvine, Irvine, California, United States of America.|Department of Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States of America.|Johann Radon Institute for Computational and Applied Mathematics, Austrian Academy of Sciences, Linz, Austria.|Neuroscience Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.|Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany.