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Assessing the Repeatability of Multi-Frequency Multi-Layer Brain Network Topologies Across Alternative Researcher’s Choice Paths

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Abstract

There is a growing interest in the neuroscience community on the advantages of multilayer functional brain networks. Researchers usually treated different frequencies separately at distinct functional brain networks. However, there is strong evidence that these networks share complementary information while their interdependencies could reveal novel findings. For this purpose, neuroscientists adopt multilayer networks, which can be described mathematically as an extension of trivial single-layer networks. Multilayer networks have become popular in neuroscience due to their advantage to integrate different sources of information. Here, Ι will focus on the multi-frequency multilayer functional connectivity analysis on resting-state fMRI (rs-fMRI) recordings. However, constructing a multilayer network depends on selecting multiple pre-processing steps that can affect the final network topology. Here, I analyzed the rs-fMRI dataset from a single human performing scanning over a period of 18 months (84 scans in total), and the rs-fMRI dataset containing 25 subjects with 3 repeat scans. I focused on assessing the reproducibility of multi-frequency multilayer topologies exploring the effect of two filtering methods for extracting frequencies from BOLD activity, three connectivity estimators, with or without a topological filtering scheme, and two spatial scales. Finally, I untangled specific combinations of researchers’ choices that yield consistently brain networks with repeatable topologies, giving me the chance to recommend best practices over consistent topologies.

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Code Availability

Python code for the portrait divergence is freely available online (https://github.com/bagrow/network-portrait-divergence). MATLAB code for the Orthogonal Minimum Spanning Tree thresholding is freely available online (https://github.com/stdimitr/topological_filtering_networks).

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Acknowledgements

SID is supported by a Beatriu de Pinós fellowship (2020 BP 00116). SID was supported by MRC grant MR/K004360/1 and a Marie Sklodowska-Curie COFUND EU-UK Research Fellowship.

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Correspondence to Stavros I. Dimitriadis.

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This study has been submitted to biorxiv as a preprint research article and can be found at the following link:

https://www.biorxiv.org/content/10.1101/2021.10.10.463799v1

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Dimitriadis, S.I. Assessing the Repeatability of Multi-Frequency Multi-Layer Brain Network Topologies Across Alternative Researcher’s Choice Paths. Neuroinform 21, 71–88 (2023). https://doi.org/10.1007/s12021-022-09610-6

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  • DOI: https://doi.org/10.1007/s12021-022-09610-6

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