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  Opposing Effects of Contextual Surround in Human Early Visual Cortex Revealed by Functional Magnetic Resonance Imaging with Continuously Modulated Visual Stimuli

Tajima, S., Watanabe, M., Chihiro, I., Ueno, K., Asamizuya, T., Sun, P., et al. (2010). Opposing Effects of Contextual Surround in Human Early Visual Cortex Revealed by Functional Magnetic Resonance Imaging with Continuously Modulated Visual Stimuli. The Journal of Neuroscience, 30(9), 3264-3270. doi:10.1523/JNEUROSCI.4473-09.2010.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C0F6-E Version Permalink: http://hdl.handle.net/21.11116/0000-0002-773D-5
Genre: Journal Article

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www.jneurosci.org/content/30/9/3264.full.pdf (Publisher version)
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 Creators:
Tajima, S, Author
Watanabe, M1, Author              
Chihiro, I, Author
Ueno, K, Author
Asamizuya , T, Author
Sun, P, Author
Tanaka, K, Author
Cheng, K, Author
Affiliations:
1University of Tokyo, ou_persistent22              

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 Abstract: Spatial context in vision has profound effects on neural responses and perception. Recent animal studies suggest that the effect of surround on a central stimulus can dramatically change its character depending on the contrast of the center stimulus, but such a drastic change has not been demonstrated in the human visual cortex. To examine the dependency of the surround effect on the contrast of the center stimulus, we conducted an functional magnetic resonance imaging experiment by using a low or a high contrast in the center region while the surround contrast was sinusoidally modulated between the two contrasts. We found that the blood oxygen level-dependent response in human V1 corresponding to the center region was differentially modulated by the surround contrast, depending crucially on the center contrast: whereas a suppressive effect was observed in conditions in which the center contrast was high, a facilitative effect was seen in conditions where the center contrast was low.

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 Dates: 2010-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1523/JNEUROSCI.4473-09.2010
BibTex Citekey: 6341
 Degree: -

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Title: The Journal of Neuroscience
  Other : The Journal of Neuroscience: the Official Journal of the Society for Neuroscience
  Abbreviation : J. Neurosci.
Source Genre: Journal
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Publ. Info: Washington, DC : Society of Neuroscience
Pages: - Volume / Issue: 30 (9) Sequence Number: - Start / End Page: 3264 - 3270 Identifier: ISSN: 0270-6474
CoNE: https://pure.mpg.de/cone/journals/resource/954925502187_1