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Cited by 548

The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.

Competitive and cooperative dynamics of large-scale brain functional networks supporting recollection

Open access
Fornito, Alex, Harrison, Ben J., Zalesky, Andrew, Simons, Jon S.·2012·Proceedings of the National Academy of Sciences
DOI 10.1073/pnas.1204185109
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Abstract

Analyses of functional interactions between large-scale brain networks have identified two broad systems that operate in apparent competition or antagonism with each other. One system, termed the default mode network (DMN), is thought to support internally oriented processing. The other system acts as a generic external attention system (EAS) and mediates attention to exogenous stimuli. Reports that the DMN and EAS show anticorrelated activity across a range of experimental paradigms suggest that competition between these systems supports adaptive behavior. Here, we used functional MRI to characterize functional interactions between the DMN and different EAS components during performance of a recollection task known to coactivate regions of both networks. Using methods to isolate task-related, context-dependent changes in functional connectivity between these systems, we show that increased cooperation between the DMN and a specific right-lateralized frontoparietal component of the EAS is associated with more rapid memory recollection. We also show that these cooperative dynamics are facilitated by a dynamic reconfiguration of the functional architecture of the DMN into core and transitional modules, with the latter serving to enhance integration with frontoparietal regions. In particular, the right posterior cingulate cortex may act as a critical information-processing hub that provokes these context-dependent reconfigurations from an intrinsic or default state of antagonism. Our findings highlight the dynamic, context-dependent nature of large-scale brain dynamics and shed light on their contribution to individual differences in behavior.

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Metadata

Authors
Fornito, A., Harrison, B. J., Zalesky, A., & Simons, J. S.
Venue
Proceedings of the National Academy of Sciences
Publisher
Proceedings of the National Academy of Sciences
Published
2012-07-17
Volume
109
Issue
31
Pages
12788-12793
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
DOI
10.1073/pnas.1204185109
OpenAlex
W2147401077
Cited by
548
References
34
FWCI
16.89
Type
journal article
Language
en
Open access
green

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