1. Graduate School of Informatics and Engineering, University of Electro-Communications, Tokyo, Japan
2. Research Fellowship for Young Scientists, Japan Society for the Promotion of Science, Tokyo, Japan
3. Department of health science, Health Science University, Yamanashi, Japan
4. Center for Neuroscience and Biomedical Engineering, University of Electro-Communications, Tokyo, Japan
5. Department of Anatomy and Physiology and Kinesiology, Kansas State University, Manhattan, Kansas