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Investigation of roles of neural oscillatory activity in the control of eye movements

Research Project

Project/Area Number 18K07350
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51010:Basic brain sciences-related
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

YOKOYAMA Osamu  公益財団法人東京都医学総合研究所, 脳・神経科学研究分野, 主任研究員 (60455409)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords神経オシレーション活動 / 眼球運動 / サッカード / 前頭眼野 / 補足眼野 / 局所場電位 / 脳電気刺激 / サル / 空間的注意 / 注意 / 交流電気刺激 / 運動実行 / 脳活動操作法 / 前頭葉
Outline of Final Research Achievements

We investigated roles of neural oscillation activity in cerebral movement-related areas in motor initiation and spatial selection. We found that two Japanese macaques generated most spontaneous rapid eye movements every 2-3 seconds, and that around the time of movement initiation, 2-3 Hz and approximately 10 Hz oscillation activity in the frontal eye fields was in a certain phase. Similarly, phase synchronization occurred at the start of wrist movement in multiple cerebral cortical motor areas and basal ganglia with some phase lags among the areas. The effect of high-frequency electrical stimulation to the supplementary eye field was dependent on the brain state, and the subsequent selection of eye movement targets was also affected. These results indicated that neural oscillation activity in the cerebral motor-related areas plays a role in motor initiation and spatial selection.

Academic Significance and Societal Importance of the Research Achievements

大脳皮質や大脳基底核で観察される周期的な神経活動のうち特定の周波数(2~3ヘルツ、および約10ヘルツ)の活動が眼球や手首の運動の開始と密接な関係を持っていることが判った。また電気刺激によってこうした活動を変化させることで、その時の脳の状態に応じて眼球運動やその標的の選択が変化することも判った。こうした知見を積み重ねていくことで、運動や認知を実現する神経基盤に関する理解が深まり、ひいてはこうした機能の障害が関わる神経疾患の予防法や治療法、機能をより向上させる技術など、電気刺激を応用した有用な手法の開発に繋がる可能性がある。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (11 results)

All 2021 2019 2018 Other

All Journal Article (1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results) Remarks (4 results)

  • [Journal Article] アスリート脳の理解に向けて2019

    • Author(s)
      横山修、田添歳樹、西村幸男
    • Journal Title

      Brain and Nerve

      Volume: 71 Pages: 99-103

    • Related Report
      2018 Research-status Report
  • [Presentation] Top-down control of distributed attention by the supplementary eye field in monkeys2021

    • Author(s)
      横山修、西村幸男
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Control of visual spatial attention in the frontal eye field and supplementary eye field of monkeys2019

    • Author(s)
      横山修、西村幸男
    • Organizer
      NEURO2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Representations of hand movements by neurons and local field potentials in the primary motor cortex and medial motor areas in monkeys2019

    • Author(s)
      中山義久、横山修、星英司
    • Organizer
      NEURO2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 補足眼野ニューロンは動的に変化する空間性注意の広がりをコードする2018

    • Author(s)
      横山修、星英司、西村幸男
    • Organizer
      2018年度 次世代脳プロジェクト冬のシンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] Encoding of contralateral and ipsilateral hand movements by neurons and local field potentials in the primary motor cortex in monkeys2018

    • Author(s)
      Yoshihisa Nakayama, Osamu Yokoyama, Eiji Hoshi
    • Organizer
      The 48th annual meeting of the Society of Neuroscience
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Encoding of varying spatial extent of visual attention in supplementary eye field2018

    • Author(s)
      Osamu Yokoyama, Eiji Hoshi, Yukio Nishimura
    • Organizer
      11th FENS Forum of Neuroscience
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 公益財団法人東京都医学総合研究所 脳機能再建プロジェクト

    • URL

      https://neural-prosthetics.jp/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 公益財団法人 東京都医学総合研究所 脳機能再建プロジェクト

    • URL

      https://www.igakuken.or.jp/neuroprosth/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 公益財団法人 東京都医学総合研究所 脳機能再建プロジェクト Research

    • URL

      http://www.igakuken.or.jp/neuroprosth/research.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 公益財団法人東京都医学総合研究所 脳機能再建プロジェクト

    • URL

      http://www.igakuken.or.jp/neuroprosth/index.html

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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