Decision-making ability of Physarum polycephalum enhanced by its coordinated spatiotemporal oscillatory dynamics

Koji Iwayama, Liping Zhu, Yoshito Hirata, Masashi Aono, Masahiko Hara, Kazuyuki Aihara

研究成果: Article査読

9 被引用数 (Scopus)

抄録

An amoeboid unicellular organism, a plasmodium of the true slime mold Physarum polycephalum, exhibits complex spatiotemporal oscillatory dynamics and sophisticated information processing capabilities while deforming its amorphous body. We previously devised an 'amoeba-based computer (ABC),' that implemented optical feedback control to lead this amoeboid organism to search for a solution to the traveling salesman problem (TSP). In the ABC, the shortest TSP route (the optimal solution) is represented by the shape of the organism in which the body area (nutrient absorption) is maximized while the risk of being exposed to aversive light stimuli is minimized. The shortness of the TSP route found by ABC, therefore, serves as a quantitative measure of the optimality of the decision made by the organism. However, it remains unclear how the decision-making ability of the organism originates from the oscillatory dynamics of the organism. We investigated the number of coexisting traveling waves in the spatiotemporal patterns of the oscillatory dynamics of the organism. We show that a shorter TSP route can be found when the organism exhibits a lower number of traveling waves. The results imply that the oscillatory dynamics are highly coordinated throughout the global body. Based on the results, we discuss the fact that the decision-making ability of the organism can be enhanced not by uncorrelated random fluctuations, but by its highly coordinated oscillatory dynamics.

本文言語English
論文番号036001
ジャーナルBioinspiration and Biomimetics
11
3
DOI
出版ステータスPublished - 2016 4月 12
外部発表はい

ASJC Scopus subject areas

  • バイオテクノロジー
  • 生物理学
  • 生化学
  • 分子医療
  • 工学(その他)

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