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Network analysis for the visual information processing by magneto encephalography

Research Project

Project/Area Number 07670715
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Neurology
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

TOBIMATSU Shozo  Kyushu Univ., Faculty of Medicine, Lecturer, 医学部, 講師 (40164008)

Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsmagneto encephalography / visual information / parallel processing / magnocellular system / parvocellular system / color vision / motion / ネットワーク解析
Research Abstract

Visual information processing has been studied non-invasively by using magnetoencephalography (MEG). The following results were obtained.
1.Neural generators of pattern reversal visual evoked potentials (VEPs) : Transient VEPs consist of N75, P100 and N145. We estimated location of the current dipoles of VEPs in order to clarify their neural generators. Source localization by the MEG indicated that all the three components were located around the calcarine fissure. The source of P100 was most reliable among the components. Based on our results, N75 and P100 may be generated in the striate cortex. Although our study suggests that N145 may also be generated in V1, further study is necessary.
2.Parallel processing by magnocellular and parvocellular systems : Magnocellular system plays an important role for motion perception while parvocellular system in color vision and form perception. We stimulated these two systems selectively by using an apparent motion display and isoluminant red-green sinusoidal gratings. The apparent motion evoked P120 while chromatic gratings showed N120. These dipoles were estimated in the striate visual cortex, suggesting that there is a parallel processing within the primary visual cortex.
3.Patients with neurological disorders : Some neurological disorders have visual deficits such as akinetopsia and achromatopsia. Unfortunately, we could not examine such patients due to the limited time schedule.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Tobimatsu,S.,Tomoda,H.,Kato,M.: "Human VEPs to isoluminant chromatic and achromatic sinusoidal gratings : scparation of parvocellular components" Brain Topogr. 8(3). 241-243 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 飛松省三: "ヒト視覚情報の並列的処理過程" 神経心理. 19(1). 22-28 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu,S.and Kato,M.: "The effect of binocular stimulation on each component of transient and steady-state VEPs." Electroenceph.clin.Neurophysiol. 100(3). 177-183 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu,S.,Tomoda,H.,Kato,M.: "Normal variability of the amplitude and phase of steady-state VEPs." Electroenceph.clin.Neurophysiol.100(3). 171-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 飛松省三: "視覚誘発電位の最近の進歩" 脳波と筋電図. 24(3). 173-183 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 飛松省三: "大脳における視覚情報処理" 神経眼科. 13(6). 128-133 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu, S., Tomoda, H., and Kato, M.: "Human VEPs to isoluminant chromatic and achromatic sinusoidal gratings : separation of parvocellular components." Brain Topogr. 8(3). 241-243 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu, S., Tomoda, H., and Kato, M.: "Normal variability of the amplitude and phase of steadystate VEPs." Electroenceph.clin.Neurophysiol.100(3). 171-176 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu, S., and Kato, M.: "The effect of binocular stimulation on each component of transient and steady-state VEPs." Electroenceph.clin.Neurophysiol.100(3). 177-183 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu, S.: "The technique for evaluating the multiple visual channels : multimodality evoked potentials." Recent advances in clinical neurophysiology Elsevier, Amsterdam. 426-428 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tobimatsu,S.,Tomoda,H.,Kato,M.: "Human VEPs to isoluminant chromatic and achromatic sinusoidal gratings:separation of parvocellular components" Brain Topogr. 8(3). 241-243 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 飛松省三: "ヒト視覚情報の並列的処理過程" 神経心理. 19(1). 22-28 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tobimatsu,S.and Kato,M.: "The effect of binocular stimulation on each component of transient and steady-state VEPs." Electroenceph.clin.Neurophysiol. 100(3). 177-183 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tobimatsu,S.,Tomoda,H.,Kato,M.: "Normal variability of the amplitude and phase of steady-state VEPs." Electroenceph.clin.Neurophysiol.100(3). 171-176 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 飛松省三: "視覚誘発電位の最近の進歩" 脳波と筋電図. 24(3). 173-183 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 飛松省三: "大脳における視覚情報処理" 神経眼科. 13(6). 128-133 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 飛松省三: "大脳における視覚情報処理" 神経眼科. (印刷中).

    • Related Report
      1995 Annual Research Report
  • [Publications] 飛松省三: "視覚誘発電位の最近の進歩" 脳波と筋電図. (印刷中).

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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