Interactions between default mode and control networks as a function of increasing cognitive reasoning complexity

Hearne, Luke, Cocchi, Luca, Zalesky, Andrew and Mattingley, Jason B. (2015) Interactions between default mode and control networks as a function of increasing cognitive reasoning complexity. Human Brain Mapping, 36 7: 2719-2731. doi:10.1002/hbm.22802

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Author Hearne, Luke
Cocchi, Luca
Zalesky, Andrew
Mattingley, Jason B.
Title Interactions between default mode and control networks as a function of increasing cognitive reasoning complexity
Journal name Human Brain Mapping   Check publisher's open access policy
ISSN 1065-9471
1097-0193
Publication date 2015-04-02
Year available 2015
Sub-type Article (original research)
DOI 10.1002/hbm.22802
Open Access Status
Volume 36
Issue 7
Start page 2719
End page 2731
Total pages 13
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Collection year 2016
Language eng
Formatted abstract
Successful performance of challenging cognitive tasks depends on a consistent functional segregation of activity within the default-mode network, on the one hand, and control networks encompassing frontoparietal and cingulo-opercular areas on the other. Recent work, however, has suggested that in some cognitive control contexts nodes within the default-mode and control networks may actually cooperate to achieve optimal task performance. Here, we used functional magnetic resonance imaging to examine whether the ability to relate variables while solving a cognitive reasoning problem involves transient increases in connectivity between default-mode and control regions. Participants performed a modified version of the classic Wason selection task, in which the number of variables to be related is systematically varied across trials. As expected, areas within the default-mode network showed a parametric deactivation with increases in relational complexity, compared with neural activity in null trials. Critically, some of these areas also showed enhanced connectivity with task-positive control regions. Specifically, task-based connectivity between the striatum and the angular gyri, and between the thalamus and right temporal pole, increased as a function of relational complexity. These findings challenge the notion that functional segregation between regions within default-mode and control networks invariably support cognitive task performance, and reveal previously unknown roles for the striatum and thalamus in managing network dynamics during cognitive reasoning.
Keyword Cognitive control
Connectivity
Default-mode
Networks
Reasoning
Relational complexity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 2 APR 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2016 Collection
School of Psychology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
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Created: Thu, 16 Apr 2015, 22:38:10 EST by Luca Cocchi on behalf of Queensland Brain Institute