Hierarchical features of large-scale cortical connectivity

Statistical Physics and Biological Information

Abstract.

The analysis of complex networks has revealed patterns of organization in a variety of natural and artificial systems, including neuronal networks of the brain at multiple scales. In this paper, we describe a novel analysis of the large-scale connectivity between regions of the mammalian cerebral cortex, utilizing a set of hierarchical measurements proposed recently. We examine previously identified functional clusters of brain regions in macaque visual cortex and cat cortex and find significant differences between such clusters in terms of several hierarchical measures, revealing differences in how these clusters are embedded in the overall cortical architecture. For example, the ventral cluster of visual cortex maintains structurally more segregated, less divergent connections than the dorsal cluster, which may point to functionally different roles of their constituent brain regions.

Keywords

Brain Region Cerebral Cortex Visual Cortex Complex Network Multiple Scale 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  1. 1.Instituto de Física de São Carlos, Universidade de São PauloSPBrazil
  2. 2.Department of PsychologyIndiana UniversityBloomingtonUSA

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