About the Authors

Jun Namikawa

Affiliation Brain Science Institute, RIKEN, Wako, Japan

Ryunosuke Nishimoto

Affiliation Brain Science Institute, RIKEN, Wako, Japan

Jun Tani

tani@brain.riken.jp

Affiliation Brain Science Institute, RIKEN, Wako, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JN RN JT. Performed the experiments: RN. Analyzed the data: JN. Wrote the paper: JN JT. Designed the software used in analysis: JN.