On null models for temporal small-worldness in brain dynamics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Network Neuroscience Année : 2024

On null models for temporal small-worldness in brain dynamics

Résumé

Brain dynamics can be modeled as a temporal brain network starting from the activity of different brain regions in functional magnetic resonance imaging (fMRI) signals. When validating hypotheses about temporal networks, it is important to use an appropriate statistical null model that shares some features with the treated empirical data. The purpose of this work is to contribute to the theory of temporal null models for brain networks by introducing the Random Temporal Hyperbolic Graph Model (RTH), an extension of the Random Hyperbolic Graph (RH), known in the study of complex networks for its ability to reproduce crucial properties of real-world networks. We focus on temporal small-worldness which, in the static case, has been extensively studied in real-world complex networks and has been linked to the ability of brain networks to efficiently exchange information. We compare the RTH Graph Model with standard null models for temporal networks and show it is the null model that best reproduces the small-worldness of resting brain activity. This ability to reproduce fundamental features of real brain networks, while adding only a single parameter compared to classical models, suggests that the RTH Graph Model is a promising tool for validating hypotheses about temporal brain networks.
Fichier principal
Vignette du fichier
OnNullModelsforTSWBrainHAL.pdf (6.95 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04389639 , version 1 (11-01-2024)

Identifiants

Citer

Aurora Rossi, Samuel Deslauriers-Gauthier, Emanuele Natale. On null models for temporal small-worldness in brain dynamics. Network Neuroscience, 2024, pp.1-30. ⟨10.1162/netn_a_00357⟩. ⟨hal-04389639⟩
47 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More