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Neuronal activity and attention in the primary visual cortex

Research Project

Project/Area Number 08458268
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 神経・脳内生理学
Research InstitutionOsaka University

Principal Investigator

SATO Hiromichi  Osaka University School of Health and Sport Sciences, Professor, 健康体育部, 教授 (50154092)

Co-Investigator(Kenkyū-buntansha) ICHIKAWA Takehiko  Osaka University School of Health and Sport Sciences, Research Associate, 健康体育部, 助手 (30273717)
SHIMEGI Satoshi  Osaka University School of Health and Sport Sciences, Lecturer, 健康体育部, 講師 (20271033)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1998: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1997: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1996: ¥3,900,000 (Direct Cost: ¥3,900,000)
Keywordsprimary visual cortex / stimulus specificity / stimulus-cortex dependency / cat / functional domain / horizontal connection / 視覚的注意 / 図-地分化 / 受容野特性の修飾 / 文脈依存性
Research Abstract

To study mechanisms for an integration of stimulus information distributing wide area in the visual field, we examined modulatory effects of visual responses of neurons by grating stimuli presented outside of receptive field in the primary visual cortex of anesthetized cats. Responses to the optimally oriented grating patch in the receptive field were suppressed by surrounding stimulus particularly in complex cells of the superficial layer. Effectiveness of surrounding stimulus was dependent on relationship between the cell's preferred spatial frequency (SF) and the SF of surrounding grating. Among the 21 cells which exhibited significant suppression with a presence of surrounding stimulus, the most effective SF of surrounding stimulus for the suppressive modulation was same as that of the optimal SF for the receptive field stimulus in 12 cells and different in 6 cells. In remaining 3 cells, SF dependency of the response modulation by SF was not observed. Our results suggest that neural connection among SF domains sharing similar SF preference is one of the basis of the contextual modulation of responses in the visual cortex.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Sato,H.et al.: "Effects of blocking non-NMDA receptors on visual responses in the cat visual cortex."Neuroscience. 94. 697-703 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shimegi,S.et al.: "Temporal characteristics of response integration evoked by multiple whisker stimulation in the barrel cortex of rats."Sournal of Neuroscience. 19. 10164-10175 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yoshimura,Y.et al.: "Properties of horizontal and vertical inputs to pyramidal cells in the superficial layers of the cat visual cortex."Journal of Neuroscience. 20(5)(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 佐藤宏道 他: "一次視覚野における特徴抽出のメカニズムと刺激文脈依存性"脳の科学. 21(5). 519-525 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sato, H., Hata, Y. and Tsumoto, T.: "Effects of blocking non-NMDA receptors on visual responses in the cat visual cortex"Neuroscience. 94. 7697-03 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shimegi, S., Ichikawa, T., Akasaki, T. and Sato, H.: "Temporal characteristics of response integration evoked by multiple whisker stimulations in the barrel cortex of rats"Journal of Neuroscience. 19. 10164-10175 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yoshimura, Y., Sato, H., Imamura, K. and Watanabe, Y.: "Properties of horizontal and vertical inputs to pyramidal cells in the superficial layers of the cat visual cortex"Journal of Neuroscience. 20(5)(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sato, H., Akasaki, T., Yoshimura, Y.: "Mechanism and context-dependency of stimulus specific response properties in the visual cortex"Nounokagaku. 21(5). 519-525 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sato,H., Katsuyama,N., Tamura,H., Hata,Y. & Tsumoto,T: "Mechanisms underlying orientation selectivity of neurons in the primary visual cortex of the macaque." Journal of Physiology (London). 494. 757-771 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Sato,H.,Katsuyama,N.,Tamura,H.,Hata,Y.& Tsumoto,T: "Mechanisms underlying orientation selectivity of neurons in the primary visual cortex of the macaque." Journal of Physiology(London). 494. 757-771 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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