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  Predicted contextual modulation varies with distance from pinwheel centers in the orientation preference map

Okamoto, T., Ikezoe, K., Tamura, H., Watanabe, M., Aihara, K., & Fujita, I. (2011). Predicted contextual modulation varies with distance from pinwheel centers in the orientation preference map. Scientific Reports, 1: 114, pp. 1-11. doi:10.1038/srep00114.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B986-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B023-0
Genre: Journal Article

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https://www.nature.com/articles/srep00114.pdf (Publisher version)
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Okamoto, T, Author
Ikezoe, K, Author
Tamura, H, Author
Watanabe, M1, Author              
Aihara, K, Author
Fujita, I, Author
Affiliations:
1Graduate School of Engineering, University of Tokyo, ou_persistent22              

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 Abstract: In the primary visual cortex (V1) of some mammals, columns of neurons with the full range of orientation preferences converge at the center of a pinwheel-like arrangement, the ‘pinwheel center’ (PWC). Because a neuron receives abundant inputs from nearby neurons, the neuron's position on the cortical map likely has a significant impact on its responses to the layout of orientations inside and outside its classical receptive field (CRF). To understand the positional specificity of responses, we constructed a computational model based on orientation preference maps in monkey V1 and hypothetical neuronal connections. The model simulations showed that neurons near PWCs displayed weaker but detectable orientation selectivity within their CRFs, and strongly reduced contextual modulation from extra-CRF stimuli, than neurons distant from PWCs. We suggest that neurons near PWCs robustly extract local orientation within their CRF embedded in visual scenes, and that contextual information is processed in regions distant from PWCs.

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 Dates: 2011-10
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/srep00114
BibTex Citekey: OkamotoITWAF2011
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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 1 Sequence Number: 114 Start / End Page: 1 - 11 Identifier: ISSN: 2045-2322
CoNE: /journals/resource/2045-2322