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Cortical Potentials preceedin voluntary saccades

Research Project

Project/Area Number 04670498
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Neurology
Research InstitutionTeikyo University School of Medicine

Principal Investigator

SHIMIZU Natsue  Teikyo Univ.Sch.Med., Dept.ofNeurology, Professor, 医学部, 教授 (80095017)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1992: ¥700,000 (Direct Cost: ¥700,000)
Keywordseye movement / cortical potential / readiness potential / voluntary movement / imaginary movement / saccade
Research Abstract

The distribution and characteristics of the presaccadic slow negative potentials(PSN), associated with self-paced voluntary saccades were studied. There was a wide spread PSN, beginning at 1400msec prior to saccades with the maximum amplitude on the vertex. The amplitude of PSN was greater over the frontocentral electrodes contralateral to the direction of the saccades. These findings suggests that PSN reflects the activities of the supplementary motor area as well as the frontal eye field contralateral to the direction of saccades. In darkness, PSN associated with saccades did not extend to the occipital electrodes. Therefore, the occipital component of PSN may reflect activation of occipital cortices related to visual stimuli. The laterality of the amplitude of PSN may come from the paradoxical lateralization as seen on visual evoked potentials.
The Bereitschaftspotential(BP), studied by voluntary finger movements and imaginary finger movements, showed that the distribution, onset and amplitude of early component and the maximum component were about identical with voluntary movements and imaginary movements. It was suggested that the BP reflects the level of intention, thinking, attention, and programming of the movements. The actual excursion of the movement is not necessary for BP.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 清水夏繪: "眼球運動関連脳電位" 神経眼科. 9. 56-58 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 沖山亮一,清水夏繪: "衝撃性眼球運動に関連する頭皮上電位-Presaccadic slow negative potentialの頭皮上分布について-" 臨床神経学. 33. 483-490 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Natsue Shimizu & Rhouichi Okiyama(H.Narabayashi,T.Nagatsu,N.Yanagisawa and Y.Mizuno ed.): "Advances in Neurology,Vol 60(Bereischaftspotential Preceding Voluntary Saccades is Abnormal in Patients with Parkinson'Gisease)" Raven Press, 398-402 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimizu, N: "Eye movement related cortical potentials." Neuro-ophthalmol Jpn. 9. 56-58 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Okiyama, R & Shimizu, N.: "Saccadic eye movement related cortical potentials - presaccadic slow negative potential -" Clin Neurol. 33. 483-490 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimizu, N.and Okiyama, R.: "Bereitschaftspotential preceeding voluntary saccades is abnormal in patients with Parkinson's disease." Advandes in Neurology. Vol 60 (ed.by Narabayashi, H et al) Raven Press. 398-402 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 沖山亮一、清水夏繪: "衝撃性眼球運動に関連する頭皮上電位-presaccadic slow negative potentialの頭皮上分布について-" 臨床神経学. 33. 483-490 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 清水 夏繪: "眼球運動関連脳電位" 神経眼科. 9. 56-58 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Natsue Shimizu & Ryouichi Okiyama (H.Narabayashi,T.Nagatsu,N.Yanagisawa and Y.Mizuno ed.): "Advances in Neurology,vol.60 (Bereitschaftspotential Preceeding Voluntary Saccades is Abnormal in patients With parkinsorn's Disease)" Raven press, 398-402 (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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