Resolving anatomical and functional structure in human brain organization: identifying mesoscale organization in weighted network representations
Human brain anatomy and function display a combination of modular and hierarchical organization, suggesting the importance of both cohesive structures and variable resolutions in the facilitation of healthy cognitive processes. However, tools to simultaneously probe these features of brain architect...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
October 2, 2014
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| In: |
PLoS Computational Biology
Year: 2014, Volume: 10, Issue: 10 |
| ISSN: | 1553-7358 |
| DOI: | 10.1371/journal.pcbi.1003712 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1371/journal.pcbi.1003712 Verlag, lizenzpflichtig, Volltext: https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1003712 
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| Author Notes: | Christian Lohse, Danielle S. Bassett, Kelvin O. Lim, Jean M. Carlson |
MARC
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| 520 | |a Human brain anatomy and function display a combination of modular and hierarchical organization, suggesting the importance of both cohesive structures and variable resolutions in the facilitation of healthy cognitive processes. However, tools to simultaneously probe these features of brain architecture require further development. We propose and apply a set of methods to extract cohesive structures in network representations of brain connectivity using multi-resolution techniques. We employ a combination of soft thresholding, windowed thresholding, and resolution in community detection, that enable us to identify and isolate structures associated with different weights. One such mesoscale structure is bipartivity, which quantifies the extent to which the brain is divided into two partitions with high connectivity between partitions and low connectivity within partitions. A second, complementary mesoscale structure is modularity, which quantifies the extent to which the brain is divided into multiple communities with strong connectivity within each community and weak connectivity between communities. Our methods lead to multi-resolution curves of these network diagnostics over a range of spatial, geometric, and structural scales. For statistical comparison, we contrast our results with those obtained for several benchmark null models. Our work demonstrates that multi-resolution diagnostic curves capture complex organizational profiles in weighted graphs. We apply these methods to the identification of resolution-specific characteristics of healthy weighted graph architecture and altered connectivity profiles in psychiatric disease. | ||
| 650 | 4 | |a Artificial neural networks | |
| 650 | 4 | |a Community structure | |
| 650 | 4 | |a Fractals | |
| 650 | 4 | |a Functional magnetic resonance imaging | |
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| 650 | 4 | |a Network analysis | |
| 650 | 4 | |a Neural networks | |
| 650 | 4 | |a Schizophrenia | |
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| 700 | 1 | |a Lim, Kelvin O. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Carlson, Jean M. |e VerfasserIn |4 aut | |
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