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Intrinsic functional connectivity predicts individual differences in distractibility.

Victoria N Poole1, Meghan E Robinson2, Omar Singleton3

  • 1Translational Research Center for TBI and Stress Disorders (TRACTS), VA RR&D TBI Center of Excellence, VA Boston Healthcare System, Boston, MA, USA; Division of Gerontology, Beth Israel Deaconess Medical Center, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Neuroimaging Research for Veterans (NeRVe) Center, VA Boston Healthcare System, Boston, MA, USA; Boston Attention and Learning Lab (BAL|LAB), VA Boston Healthcare System, Boston, MA, USA.

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Summary

Individual differences in distractor suppression ability are linked to brain network connectivity. Greater default mode network (DMN) integrity and independence correlate with better attentional control, while increased DMN-attention network interaction predicts poorer performance.

Keywords:
AttentionDistractionFunctional connectivityResting-State fMRISupport vector regression

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuroimaging

Background:

  • Distractor suppression is crucial for task performance, involving a balance between attention and default mode networks.
  • Individual differences in distractor suppression are not fully understood in relation to intrinsic brain network connectivity.

Purpose of the Study:

  • To investigate the relationship between resting-state functional connectivity within and between the dorsal attention network (DAN), ventral attention network (VAN), and default mode network (DMN) and individual differences in distractor suppression ability.

Main Methods:

  • Resting-state fMRI data were collected from 32 Veterans.
  • Support vector regression models predicted distractor suppression performance using connectivity data.
  • Leave-one-subject-out cross-validation was employed.

Main Results:

  • Resting-state connectivity significantly predicted distractor suppression performance (r=0.48, p=0.0053).
  • Increased within-network default mode network (DMN) connectivity predicted better distractor suppression.
  • Greater connectivity between the DMN and attention networks (DAN, VAN) predicted poorer distractor suppression.

Conclusions:

  • Resting-state functional connectivity is associated with stable individual differences in cognitive abilities like distractor suppression.
  • Enhanced integrity and independence of the DMN are linked to superior attentional control and distractor suppression ability.