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Phasic alerting effects on visual processing speed are associated with intrinsic functional connectivity in the

Marleen Haupt1, Adriana L Ruiz-Rizzo2, Christian Sorg3

  • 1General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians-Universität München, Munich, Germany.

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Summary
This summary is machine-generated.

This study found that the ability to benefit from warning cues, known as phasic alertness, is linked to lower intrinsic functional connectivity (iFC) within the cingulo-opercular network. This suggests a novel neural mechanism for how the brain enhances visual processing speed.

Keywords:
Cingulo-opercular networkICAIntrinsic functional connectivityPhasic alertnessResting-state fMRITheory of visual attention

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuroimaging

Background:

  • Phasic alertness enhances performance after warning cues.
  • Visual processing speed is linked to intrinsic functional connectivity (iFC) in the cingulo-opercular network.
  • The role of cingulo-opercular iFC in actively utilizing warning cues is unclear.

Purpose of the Study:

  • To investigate the relationship between cingulo-opercular network iFC and individual differences in phasic alertness.
  • To determine if iFC within this network predicts the extent to which individuals benefit from warning cues to improve visual processing speed.

Main Methods:

  • Resting-state fMRI data from 32 participants were analyzed using independent component analysis and dual regression to assess iFC.
  • Behavioral testing measured the impact of auditory warning cues on visual processing speed using a Theory of Visual Attention (TVA) based paradigm.
  • Voxel-wise multiple regression was employed to correlate iFC with phasic alerting effects.

Main Results:

  • Higher individual phasic alerting effects on visual processing speed were significantly associated with lower iFC in the cingulo-opercular network.
  • The peak association was observed in the left superior orbital gyrus.
  • No significant associations were found between phasic alertness and iFC in other attention-related networks or inter-network connectivity.

Conclusions:

  • Individual differences in benefiting from phasic alerting are primarily linked to intrinsic functional connectivity within the cingulo-opercular network.
  • Lower iFC in this network may facilitate greater improvements in visual processing speed from warning cues.
  • This finding highlights a specific neural mechanism underlying the dynamic modulation of readiness by external cues.