Structure–function relationship in complex brain networks expressed by hierarchical synchronization
- 1 June 2007
- journal article
- Published by IOP Publishing in New Journal of Physics
- Vol. 9 (6), 178
- https://doi.org/10.1088/1367-2630/9/6/178
Abstract
The brain is one of the most complex systems in nature, with a structured complex connectivity. Recently, large-scale corticocortical connectivities, both structural and functional, have received a great deal of research attention, especially using the approach of complex network analysis. Understanding the relationship between structural and functional connectivity is of crucial importance in neuroscience. Here we try to illuminate this relationship by studying synchronization dynamics in a realistic anatomical network of cat cortical connectivity. We model the nodes (cortical areas) by a neural mass model (population model) or by a subnetwork of interacting excitable neurons (multilevel model). We show that if the dynamics is characterized by well-defined oscillations (neural mass model and subnetworks with strong couplings), the synchronization patterns are mainly determined by the node intensity (total input strengths of a node) and the detailed network topology is rather irrelevant. On the other hand, the multilevel model with weak couplings displays more irregular, biologically plausible dynamics, and the synchronization patterns reveal a hierarchical cluster organization in the network structure. The relationship between structural and functional connectivity at different levels of synchronization is explored. Thus, the study of synchronization in a multilevel complex network model of cortex can provide insights into the relationship between network topology and functional organization of complex brain networks.Keywords
This publication has 60 references indexed in Scilit:
- Small-World Brain NetworksThe Neuroscientist, 2006
- A mechanism for cognitive dynamics: neuronal communication through neuronal coherenceTrends in Cognitive Sciences, 2005
- Dynamics of a neural system with a multiscale architecturePhilosophical Transactions Of The Royal Society B-Biological Sciences, 2005
- Normal and pathological oscillatory communication in the brainNature Reviews Neuroscience, 2005
- The Human Connectome: A Structural Description of the Human BrainPLoS Computational Biology, 2005
- Organization, development and function of complex brain networksTrends in Cognitive Sciences, 2004
- Scale‐free dynamics of global functional connectivity in the human brainHuman Brain Mapping, 2004
- Correlated neuronal activity and the flow of neural informationNature Reviews Neuroscience, 2001
- The Connectional Organization of the Cortico-thalamic System of the CatCerebral Cortex, 1999
- Preface: Cerebral Cortex Has Come of AgeCerebral Cortex, 1991