Differences in the critical dynamics underlying the human and fruit-fly connectome

Ódor, Géza; Deco, Gustavo; Kelling, Jeffrey

doi:http://dx.doi.org/10.1103/PhysRevResearch.4.023057

Differences in the critical dynamics underlying the human and fruit-fly connectome

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Ódor G, Deco G, Kelling J. Differences in the critical dynamics underlying the human and fruit-fly connectome. Phys Rev Res. 2022;4(2):023057. DOI: 10.1103/PhysRevResearch.4.023057

Abstract

Previous simulation studies on human connectomes suggested that critical dynamics emerge subcritically in the so-called Griffiths phases. Now we investigate this on the largest available brain network, the 21662 node fruit-fly connectome, using the Kuramoto synchronization model. As this graph is less heterogeneous, lacking modular structure and exhibiting high topological dimension, we expect a difference from the previous results. Indeed, the synchronization transition is mean-field-like, and the width of the transition region is larger than in random graphs, but much smaller than as for the KKI-18 human connectome. This demonstrates the effect of modular structure and dimension on the dynamics, providing a basis for better understanding the complex critical dynamics of humans.