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  Beyond topographic representation: Decoding visuospatial attention from local activity patterns in the human frontal cortex

Kalberlah, C., Chen, Y., Heinzle, J., & Haynes, J.-D. (2011). Beyond topographic representation: Decoding visuospatial attention from local activity patterns in the human frontal cortex. International Journal of Imaging Systems and Technology, 21(2), 201-210. doi:10.1002/ima.20278.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-528D-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-FF8C-A
Genre: Journal Article

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 Creators:
Kalberlah, Christian1, 2, Author              
Chen, Yi1, 2, Author              
Heinzle, Jakob2, Author
Haynes, John-Dylan1, 2, 3, Author              
Affiliations:
1Max Planck Fellow Research Group Attention and Awareness, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634553              
2Bernstein Center for Computational Neuroscience, Berlin, Germany, ou_persistent22              
3Berlin School of Mind and Brain, Humboldt University Berlin, Germany, ou_persistent22              

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Free keywords: fMRI; Multivoxel pattern analysis; Visuospatial attention; Human frontal cortex
 Abstract: The ability to detect where a person is attending is fundamental for brain-computer-interfaces. We explore how the attentional focus can be decoded from brain signals noninvasively acquired with functional magnetic resonance imaging (fMRI). Several cortical regions have previously been reported to have topographic maps reflecting the focus of visual attention. Interestingly, attentional maps were observed to be gradually less topographic when moving from early visual areas toward extra-occipital areas. Recent studies suggested that this might indicate a shift from topographically represented local processing to a global processing dominated by laterality. However, it remains unclear, to which extent the topographical representation of a region characterizes its quality to encode visuospatial attention. Here we addressed this problem by applying multivoxel pattern analysis to fMRI signals. In combination with a cortical surface-based mapping of spatial preference, our analysis revealed a broad cortical network that locally contains information about the locus of visual attention. The informative regions are not restricted to topographic areas, but even in frontal areas, where topographic organization is almost indiscernible, the attentional locus can be decoded from brain activity. Specifically, we find attentional information in the right middle frontal gyrus and the right ventrolateral prefrontal cortex. Furthermore, in these two areas information is sufficient to distinguish attentional loci within the ipsi- as well as the contra-lateral visual hemifields. The laterality dominance decreases when moving from occipital to frontal areas. Our results suggest that information about visuospatial attention is encoded beyond topographically organized regions by local patterns of brain activity.

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Language(s): eng - English
 Dates: 20112011-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 562479
Other: P11800
DOI: 10.1002/ima.20278
 Degree: -

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Title: International Journal of Imaging Systems and Technology
  Other : Int. J. Imaging Syst. Technol.
Source Genre: Journal
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Publ. Info: New York : John Wiley & Sons
Pages: - Volume / Issue: 21 (2) Sequence Number: - Start / End Page: 201 - 210 Identifier: ISSN: 0899-9457
CoNE: https://pure.mpg.de/cone/journals/resource/954925561596