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  Decoding successive computational stages of saliency processing

Bogler, C., Bode, S., & Haynes, J.-D. (2011). Decoding successive computational stages of saliency processing. Current Biology, 21(19), 1667-1671. doi:10.1016/j.cub.2011.08.039.

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https://doi.org/10.1016/j.cub.2011.08.039 (Publisher version)
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 Creators:
Bogler, Carsten1, Author           
Bode, Stefan1, Author           
Haynes, John-Dylan1, Author           
Affiliations:
1Max Planck Fellow Research Group Attention and Awareness, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634553              

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Free keywords: Adult; Attention; Brain Mapping; Female; Humans; Magnetic Resonance Imaging; Male; Parietal Lobe; Photic Stimulation; Prefrontal Cortex; Visual Cortex; Visual Perception; Young Adult
 Abstract: An important requirement for vision is to identify interesting and relevant regions of the environment for further processing. Some models assume that salient locations from a visual scene are encoded in a dedicated spatial saliency map [1, 2]. Then, a winner-take-all (WTA) mechanism [1, 2] is often believed to threshold the graded saliency representation and identify the most salient position in the visual field. Here we aimed to assess whether neural representations of graded saliency and the subsequent WTA mechanism can be dissociated. We presented images of natural scenes while subjects were in a scanner performing a demanding fixation task, and thus their attention was directed away. Signals in early visual cortex and posterior intraparietal sulcus (IPS) correlated with graded saliency as defined by a computational saliency model. Multivariate pattern classification [3, 4] revealed that the most salient position in the visual field was encoded in anterior IPS and frontal eye fields (FEF), thus reflecting a potential WTA stage. Our results thus confirm that graded saliency and WTA-thresholded saliency are encoded in distinct neural structures. This could provide the neural representation required for rapid and automatic orientation toward salient events in natural environments.

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Language(s): eng - English
 Dates: 2011-07-222011-02-172011-08-162011-09-292011-10-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.cub.2011.08.039
PMID: 21962709
 Degree: -

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Project name : -
Grant ID : 01GQ0411
Funding program : Bernstein Computational Neuroscience Program
Funding organization : German Federal Ministry of Education and Research (BMBF)
Project name : -
Grant ID : HA 5336/1-1
Funding program : -
Funding organization : German Research Foundation (DFG)
Project name : -
Grant ID : GSC86/1-2009
Funding program : Excellence Initiative
Funding organization : German Federal Ministry of Education and Research (BMBF)
Project name : -
Grant ID : -
Funding program : -
Funding organization : Max Planck Society (MPG)

Source 1

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Title: Current Biology
  Other : Curr. Biol.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London, UK : Cell Press
Pages: - Volume / Issue: 21 (19) Sequence Number: - Start / End Page: 1667 - 1671 Identifier: ISSN: 0960-9822
CoNE: https://pure.mpg.de/cone/journals/resource/954925579107