1. a Graduate School of Information, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma-shi, Nara 630-0101, Japan, Kawato Dynamic Brain Project (Japan Science and Technology Corporation), 2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan
2. b Graduate School of Information, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma-shi, Nara 630-0101, Japan, Kawato Dynamic Brain Project (Japan Science and Technology Corporation), 2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan