title: Comparison of brain network models using cross-frequency coupling and attack strategies.
abstract: Several neuroimaging studies have suggested that functional brain connectivity networks exhibit "small-world" characteristics, whereas recent studies based on structural data have proposed a "rich-club" organization of brain networks, whereby hubs of high connection density tend to connect among themselves compared to nodes of lower density. In this study, we adopted an "attack strategy" to compare the rich-club and small-world organizations and identify the model that describes best the topology of brain connectivity. We hypothesized that the highest reduction in global efficiency caused by a targeted attack on each model's hubs would reveal the organization that better describes the topology of the underlying brain networks. We applied this approach to magnetoencephalographic data obtained at rest from neurologically intact controls and mild traumatic brain injury patients. Functional connectivity networks were computed using phase-to-amplitude cross-frequency coupling between the δ and β frequency bands. Our results suggest that resting state MEG connectivity networks follow a rich-club organization.
authors.forename: Marios
authors.initials: M
authors.lastname: Antonakakis
authors.forename: Stavros I
authors.initials: SI
authors.lastname: Dimitriadis
authors.forename: Michalis
authors.initials: M
authors.lastname: Zervakis
authors.forename: Roozbeh
authors.initials: R
authors.lastname: Rezaie
authors.forename: Abbas
authors.initials: A
authors.lastname: Babajani-Feremi
authors.forename: Sifis
authors.initials: S
authors.lastname: Micheloyannis
authors.forename: George
authors.initials: G
authors.lastname: Zouridakis
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Papanicolaou
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods*; D008297:Male; D008954:Models, Biological; D009415:Nerve Net / Q000502:physiology*; D015203:Reproducibility of Results; D012146:Rest; D055815:Young Adult