Chunk #23 — Mature Network Architecture Develops Via Segregation and Integration — Network Relationships Defined Using Region Matrix and Community Detection Methods
Though we have discussed network development in terms of the task control and default networks, the observed developmental shift from local community organization to a distributed structure via segregation and integration is not restricted to these select sets of regions. We have also used graph theoretic methods, including modularity optimization and Infomap to define developmental changes in network organization of three larger sets of regions: 97 regions defined from a meta-analysis of both speaking and button press tasks (Power et al. 2009), 89 regions from a meta-analysis of single word reading studies (Vogel et al. 2009), and 265 regions defined from multiple meta-analyses and other fcMRI techniques (Power et al. 2010a). As with previous work (Fair et al. 2009), community detection algorithms show children have a preponderance of local relationships, while adults show communities composed of regions distributed across the brain.
