Individual differences in salience and executive-control networks
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1
University of Newcastle, School of Psychology, Australia
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2
Priority Research Centre for Translational Neuroscience and Mental Health, Australia
Resting-state functional MRI (rs-fMRI) measures regional changes in low frequency blood oxygen level-dependent (BOLD) signal over time and provides insight into the intrinsic activity of neural networks when not involved in task-specific activation. Connectivity properties of intrinsic networks have been associated with cognitive performance. The current study examines the relationship between individual differences in decision-making abilities and intrinsic network connectivity strength within the executive-control and salience networks. Executive function, working memory and decision-making were characterised in 24 young adults (24+/-6.4y; 16 female). rs-fMRI were acquired using a T2*-weighted echo planar imaging (EPI) sequence (3 mm slice, 60 slices, TR/TE: 3120/21ms, flip angle = 90 º, FOV = 288mm, 96x96 matrix, voxel size = 3x3x3mm, 160 scans/run). Executive-control and salience network connectivity was derived using seed-based connectivity analysis with seeds in right dorsolateral prefrontal cortex and dorsal anterior cingulate cortex, respectively. Decision-making was measured as deliberation time on the Cambridge Gambling task (i.e. decision-making) and was negatively correlated with connectivity in the salience network but not the executive-control network. Performance on the Trail-Making task was used as a measure of executive functioning and Digit Span - Backwards score as a measure of working memory. Executive functioning scores were positively correlated with variability in executive-control network connectivity. Delayed recall on the Logical Memory test was positively correlated with connectivity in both networks. We conclude that individual differences in executive and working memory capacity are related to differences in executive-control network connectivity whereas decision-making quality is linked with salience network connectivity. These findings support distinct functional properties of these networks.
Keywords:
individual differences,
functional connectivity,
resting state fMRI,
salience network,
executive-control network
Conference:
XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014.
Presentation Type:
Poster
Topic:
Cognition and Executive Processes
Citation:
Rennie
J,
Cooper
P,
Thienel
R and
Karayanidis
F
(2015). Individual differences in salience and executive-control networks.
Conference Abstract:
XII International Conference on Cognitive Neuroscience (ICON-XII).
doi: 10.3389/conf.fnhum.2015.217.00320
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Received:
19 Feb 2015;
Published Online:
24 Apr 2015.
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Correspondence:
Prof. Frini Karayanidis, University of Newcastle, School of Psychology, Newcastle, Australia, frini.karayanidis@newcastle.edu.au