1. Dynamic Brain Network Laboratory Graduate School of Frontier Biosciences Osaka University 1‐3 Yamadaoka Suita Osaka 565‐0871 Japan
2. Department of Brain Physiology Graduate School of Medicine Osaka University 1‐3 Yamadaoka Suita Osaka 565‐0871 Japan
3. Japan Society for the Promotion of Science, 5‐3‐1 Kojimachi Chiyoda, Tokyo 102‐0083 Japan
4. Center for Information and Neural Networks (CiNet) National Institute of Information and Communications Technology Osaka University Suita Osaka 565‐0871 Japan
5. Multisensory Cognition and Computation Laboratory National Institute of Information and Communications Technology, 3‐5 Hikaridai Seika, Kyoto 619‐0289 Japan