1. Department of Mathematics, University of Leicester, University Road Leicester, LE1 7RH, United Kingdom
2. Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, P.O. Box 513 5600 MP, The Netherlands
3. Department of Mathematics, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom
4. Neuronal Circuit Mechanisms Research Group, RIKEN Brain Science Institute, Wako-shi, 351-0198, Japan
5. Laboratory for Perceptual Dynamics, RIKEN Brain Science Institute, Wako-shi, 351-0198, Japan