1. Max Planck Institute for Dynamics and Self‐Organization Göttingen D‐37077 Germany
2. Max Planck Institute of Experimental Medicine Göttingen D‐37075 Germany
3. Princeton Neuroscience Institute, Princeton, NJ, 08544, USA
4. Graduate Center for Vision Research Department of Biological Sciences SUNY College of Optometry 33 West 42nd St. New York NY 10036 USA
5. Department of Neurobiology Max Planck Institute for Biophysical Chemistry Göttingen D‐37077 Germany