Individual attentional selection capacities are reflected in interhemispheric connectivity of the parietal cortex

NeuroImage
Simone VosselGereon R Fink

Abstract

Modelling psychophysical data using the Theory of Visual Attention (TVA) allows for a quantification of attentional sub-processes, such as the resolution of competition amongst multiple stimuli by top-down control signals for target selection (TVA-parameter α). This fMRI study investigated the neural correlates of α by comparing activity differences and changes of effective connectivity between conditions where a target was accompanied by a distractor or by a second target. Twenty-five participants performed a partial report task inside the MRI scanner. The left angular gyrus (ANG), medial frontal, and posterior cingulate cortex showed higher activity when a target was accompanied by a distractor as opposed to a second target. The reverse contrast yielded activation of a bilateral fronto-parietal network, the anterior insula, anterior cingulate cortex, and left inferior occipital gyrus. A psychophysiological interaction analysis revealed that the connectivity between left ANG and the left and right supramarginal gyrus (SMG), left anterior insula, and right putamen was enhanced in the target-distractor condition in participants with worse attentional top-down control. Dynamic causal modelling suggested that the connection from l...Continue Reading

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Citations

May 23, 2016·Current Opinion in Neurobiology·Bratislav Mišić, Olaf Sporns
Nov 3, 2016·Current Opinion in Pediatrics·Michael I PosnerPascale Voelker
Apr 18, 2018·Frontiers in Human Neuroscience·Adriana L Ruiz-RizzoKathrin Finke
Oct 1, 2020·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Paola MengottiSimone Vossel
Apr 27, 2021·Frontiers in Neuroscience·Olivier RosanneTiago H Falk

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