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Functional connectivity between prefrontal and parietal cortex drives visuo-spatial attention shifts

Heinen, K; Feredoes, E; Ruff, CC; Driver, J; (2017) Functional connectivity between prefrontal and parietal cortex drives visuo-spatial attention shifts. Neuropsychologia , 99 (C) pp. 81-91. 10.1016/j.neuropsychologia.2017.02.024. Green open access

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Abstract

It is well established that the frontal eye-fields (FEF) in the dorsal attention network (DAN) guide top-down selective attention. In addition, converging evidence implies a causal role for the FEF in attention shifting, which is also known to recruit the ventral attention network (VAN) and fronto-striatal regions. To investigate the causal influence of the FEF as (part of) a central hub between these networks, we applied thetaburst transcranial magnetic stimulation (TBS) off-line, combined with functional magnetic resonance (fMRI) during a cued visuo-spatial attention shifting paradigm. We found that TBS over the right FEF impaired performance on a visual discrimination task in both hemifields following attention shifts, while only left hemifield performance was affected when participants were cued to maintain the focus of attention. These effects recovered ca. 20 min post stimulation. Furthermore, particularly following attention shifts, TBS suppressed the neural signal in bilateral FEF, right inferior and superior parietal lobule (IPL/SPL) and bilateral supramarginal gyri (SMG). Immediately post stimulation, functional connectivity was impaired between right FEF and right SMG as well as right putamen. Importantly, the extent of decreased connectivity between right FEF and right SMG correlated with behavioural impairment following attention shifts. The main finding of this study demonstrates that influences from right FEF on SMG in the ventral attention network causally underly attention shifts, presumably by enabling disengagement from the current focus of attention.

Type: Article
Title: Functional connectivity between prefrontal and parietal cortex drives visuo-spatial attention shifts
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuropsychologia.2017.02.024
Publisher version: http://dx.doi.org/10.1016/j.neuropsychologia.2017....
Language: English
Additional information: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Keywords: Attention shifts; Frontal eye-fields; Thetaburst TMS; fMRI
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
URI: https://discovery-pp.ucl.ac.uk/id/eprint/1563593
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