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Data-driven topological filtering based on orthogonal minimal spanning trees: application to multi-group MEG resting-state connectivity

Dimitriadis, Stavros, Antonakakis, Marios, Simos, Panagiotis, Fletcher, Jack M. and Papanicolaou, Andrew C. 2017. Data-driven topological filtering based on orthogonal minimal spanning trees: application to multi-group MEG resting-state connectivity. Brain Connectivity 7 (10) , pp. 661-670. 10.1089/brain.2017.0512

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Abstract

In the present study, a novel data-driven topological filtering technique is introduced to derive the backbone of functional brain networks relying on orthogonal minimal spanning trees (OMSTs). The method aims to identify the essential functional connections to ensure optimal information flow via the objective criterion of global efficiency minus the cost of surviving connections. The OMST technique was applied to multichannel, resting-state neuromagnetic recordings from four groups of participants: healthy adults (n = 50), adults who have suffered mild traumatic brain injury (n = 30), typically developing children (n = 27), and reading-disabled children (n = 25). Weighted interactions between network nodes (sensors) were computed using an integrated approach of dominant intrinsic coupling modes based on two alternative metrics (symbolic mutual information and phase lag index), resulting in excellent discrimination of individual cases according to their group membership. Classification results using OMST-derived functional networks were clearly superior to results using either relative power spectrum features or functional networks derived through the conventional minimal spanning tree algorithm.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Cardiff University Brain Research Imaging Centre (CUBRIC)
Medicine
Psychology
Publisher: Mary Ann Liebert
ISSN: 2158-0014
Date of First Compliant Deposit: 13 September 2017
Date of Acceptance: 3 November 2016
Last Modified: 12 Sep 2018 08:53
URI: http://orca.cf.ac.uk/id/eprint/104638

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