Self-organized criticality for dendritic readiness potential

19 Sep 2022  ·  Katsushi Kagaya, Tomoyuki Kubota, Kohei Nakajima ·

Self-organized criticality is a principle explaining avalanche-like phenomena obeying power-laws in integrate-and-fire type dynamical systems. Here, we demonstrate that the behaviorally relevant brain neurons, mediating voluntary and reflexive behaviors in crayfish, show signatures of self-organized criticality. The dendritic activities are into the critical states following power-laws; characterized by scaling functions within neurons; but mapped to the common scaling relation across individuals. The relation is in line with the extracellular neuronal avalanches in vertebrate species which have provided evidence of the critical brain hypothesis. Our intracellular data extend the universality of the hypothesis. In particular, it indicates that the pre-movement buildup activity before the voluntary behavioral onset "from crayfish to human", readiness potential, is shaped by the avalanches. The nervous systems can exploit the universal dynamics for volition across the phylogenetic tree.

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