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On coupled oscillator dynamics and incident behaviour patterns in slime mould Physarum polycephalum: emergence of wave packets, global streaming clock frequencies and anticipation of periodic stimuli

机译:关于粘液霉菌多头Phys的耦合振荡器动力学和入射行为模式:波包的出现,全局流时钟频率和周期性刺激的预期

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Slime mould Physarum polycephalum is a single cell which physically oscillates via contraction of actomyosin in order to achieve motility. Several of its apparently 'intelligent' behaviour patterns such as anticipatory responses to periodic stimuli have recently been attributed as functions of the coupling between the oscillating intracellular reactions which drive its rhythmic muscular contraction, but the mechanisms that underlie these phenomena have not yet been experimentally verified. Through laboratory investigations in which we entrain the P. polycephalum Plasmodium via periodic ultraviolet light exposure we find that this phenomenon is likely to result from biasing its various oscillating life processes through altering local concentration profiles of various allosteric molecules and their effectors. This temporarily overwrites the global streaming clock frequency and eradicates the wave packets usually observed in slime mould biomechanical oscillation. This response is likened to an intracellular chemical memory. We proceed to present a multi-agent model in which we demonstrate that travelling waves and oscillatory clock frequencies may emerge in the virtual organism's biomechanical oscillator, although anticipatory responses cannot be replicated by simple mechanical interactions. We conclude by arguing that these phenomena are best characterised as analogue computation and discuss practical applications therein.
机译:粘液霉头cephal是单细胞,其通过放线菌素的收缩而物理振荡,以实现运动。它的一些明显的“智能”行为模式,例如对周期性刺激的预期反应,最近被归因于驱动细胞内有节奏的肌肉收缩的振荡细胞内反应之间的耦合作用,但尚未对这些现象背后的机制进行实验验证。 。通过实验室研究,我们通过周期性的紫外线暴露携带多头疟原虫,我们发现这种现象很可能是由于通过改变各种变构分子及其效应子的局部浓度分布而偏向了其各种振荡生命过程。这会暂时覆盖全局流时钟频率,并消除粘液霉菌生物力学振荡中通常观察到的波包。这种反应类似于细胞内化学记忆。我们着手提出一种多主体模型,在该模型中,我们证明了行波和振荡时钟频率可能会出现在虚拟生物的生物机械振荡器中,尽管预期的响应无法通过简单的机械相互作用来复制。我们通过论证这些现象最好地描述为模拟计算来结束,并讨论其中的实际应用。

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