• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Spatio-temporal interaction in the parallel pathways of visual system

Research Project

Project/Area Number 16500263
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Neurophysiology and muscle physiology
Research InstitutionOsaka University

Principal Investigator

SATO Hiromichi  Osaka University, Graduate School of Medicine, Professor, 医学系研究科, 教授 (50154092)

Co-Investigator(Kenkyū-buntansha) SHIMEGI Satoshi  Osaka University, Graduate School of Medicine, Associate Professor, 医学系研究科, 助教授 (20271033)
赤崎 孝文  大阪大学, 健康体育部, 助手 (30335393)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsvisual information processing / parallel pathway / metacontrast / primary visual cortex / receptive field / stimulus characteristics / contextual modulation
Research Abstract

In the primary visual cortex (V1), a response to a stimulus in the classical receptive field (CRF) is suppressively modulated by a stimulus presented in the CRF surround (SRF). We examined the temporal dynamics of the response to CRF stimulation and the surround suppression in terms of spatial-frequency (SF) tuning of cat V1 neurons using stationary flashes of a circular sinusoidal grating patch (duration, 500ms) and an annulus (50ms) as CRF and SRF stimuli. In Experiment 1 (N=39), we stimulated CRF with grating patch of optimal orientation and varying SFs. The preferred SF shifted from low to high along time course of response. In Experiment 2 (N=48), CRF was stimulated with grating of optimal orientation and SF, while SRF was stimulated with grating of optimal orientation and varying SF sandstimulus-onset-asynchrony (SOA). SF tuning of surround suppression changed along time course of response, and effective SF of surround suppression shifted from the SF lower than that of CRF stimulus (CRF-SF) to that near CRF-SF. By changing SOA, we examined surround suppression on different temporal phases of CRF response. SRF stimulus only with low SF (<0.2c/deg) suppressed the initial phase of CRF response. These results suggest that multiple mechanisms with different SF- and temporal characteristics are involved in the surround suppression.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (8 results)

All 2006 2005 2004

All Journal Article (7 results) Book (1 results)

  • [Journal Article] Metacontrast masking suggests interaction between visual pathway with different spatial and temporal properties2006

    • Author(s)
      Ishikawa, A., Shimegi, S., Sato, H.
    • Journal Title

      Vision Research 46

      Pages: 2130-2138

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Contrast-dependent, contextual response modulation in primary visual cortex and lateral geniculate nucleus of cat.2006

    • Author(s)
      Sadakane, O., Ozeki, H., Naito, T., Akasaki, T., Kasamatsu, T., Sato, H.
    • Journal Title

      European Journal of Neuroscience 23

      Pages: 1633-1642

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Metacontrast masking suggests interaction between visual pathways with different spatial and temporal properties2006

    • Author(s)
      Ishikawa, A., Shimegi, S., Sato, H.
    • Journal Title

      Vision Research 46

      Pages: 2130-2138

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Contrast-dependent, contextual response modulation in primary visual cortex and lateral geniculate nucleus of cat.2006

    • Author(s)
      Sadakane, O., Ozeki, H., Naito, T., Akasaki, T., Kasamatsu, T.Sato, H.
    • Journal Title

      European Journal of Neuroscience 23

      Pages: 1633-1642

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Contrast-dependent, contextual response modulation in primary visual cortex and lateral geniculate nucleus of cat.2006

    • Author(s)
      Sadakane, O., Ozeki, H., Naito, T., Akasaki, T., Kasamatsu, T., Sato, H.
    • Journal Title

      European Journal of Neuroscience (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Similarity of direction tuning among responses to stimulation of different whiskers in rat barrel cortex2005

    • Author(s)
      Kida, H., Shimegi, S., Sato, H.
    • Journal Title

      Journal of Neurophysiology 94

      Pages: 2004-2018

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Relationship between excitation and inhibition underlying size tuning and contextual response modulation in the cat primary visual cortex.2004

    • Author(s)
      Ozeki, H., Sadakane, O., Akasaki, T., Naito, T., Shimegi, S., Sato, H.
    • Journal Title

      Journal of Neuroscience 24

      Pages: 1428-1438

    • Related Report
      2004 Annual Research Report
  • [Book] ニューロインフォーマティクス-視覚系を中心に-2006

    • Author(s)
      七五三木聡, 石川理子, 木田裕之, 佐藤宏道
    • Publisher
      オーム社(印刷中)
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi