Causal involvement of visual area MT in global feature-based enhancement but not contingent attentional capture

Painter, David R., Dux, Paul E. and Mattingley, Jason B. (2015) Causal involvement of visual area MT in global feature-based enhancement but not contingent attentional capture. NeuroImage, 118 90-102. doi:10.1016/j.neuroimage.2015.06.019


Author Painter, David R.
Dux, Paul E.
Mattingley, Jason B.
Title Causal involvement of visual area MT in global feature-based enhancement but not contingent attentional capture
Journal name NeuroImage   Check publisher's open access policy
ISSN 1053-8119
1095-9572
Publication date 2015-09-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.neuroimage.2015.06.019
Open Access Status Not Open Access
Volume 118
Start page 90
End page 102
Total pages 13
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
When visual attention is set for a particular target feature, such as color or shape, neural responses to that feature are enhanced across the visual field. This global feature-based enhancement is hypothesized to underlie the contingent attentional capture effect, in which task-irrelevant items with the target feature capture spatial attention. In humans, however, different cortical regions have been implicated in global feature-based enhancement and contingent capture. Here, we applied intermittent theta-burst stimulation (iTBS) to assess the causal roles of two regions of extrastriate cortex – right area MT and the right temporoparietal junction (TPJ) – in both global feature-based enhancement and contingent capture. We recorded cortical activity using EEG while participants monitored centrally for targets defined by color and ignored peripheral checkerboards that matched the distractor or target color. In central vision, targets were preceded by colored cues designed to capture attention. Stimuli flickered at unique frequencies, evoking distinct cortical oscillations. Analyses of these oscillations and behavioral performance revealed contingent capture in central vision and global feature-based enhancement in the periphery. Stimulation of right area MT selectively increased global feature-based enhancement, but did not influence contingent attentional capture. By contrast, stimulation of the right TPJ left both processes unaffected. Our results reveal a causal role for the right area MT in feature-based attention, and suggest that global feature-based enhancement does not underlie the contingent capture effect.
Keyword Area MT
Frequency tagging
Frontoparietal network
Selective attention
Temporoparietal junction
Transcranial magnetic stimulation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2016 Collection
School of Psychology Publications
 
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