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Analysis of Head Injury Mechanism and Establishment of Effective Preventive Measures in Judo

Research Project

Project/Area Number 25350821
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Sports science
Research InstitutionDokkyo Medical University

Principal Investigator

MURAYAMA Haruo  獨協医科大学, 医学部, 准教授 (20570542)

Co-Investigator(Kenkyū-buntansha) HITOSUGI Masahito  滋賀医科大学, 医学部, 教授 (90328352)
KOYAMA Katsuhiro  山梨大学, 総合研究部, 教授 (30313779)
Research Collaborator MOTOZAWA Yasuki  
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords頭部外傷 / 柔道 / スポーツ外傷 / バイオメカニクス / 頭部加速度
Outline of Final Research Achievements

The purpose of this study was to quantify the head accelerations when being thrown by judo techniques. When Judo expert threw the dummy using two throwing techniques: Osoto-gari and Ouchi-gari, the dummy fell backwards with the occipital area of the skull contacting the tatami. Peak resultant translational and rotational accelerations were observed at the initial contact. Therefore, avoiding head contact is essential to prevent head injury. When the cushioning-mat installed under the tatami, the peak values of resultant translational acceleration were significantly less for both techniques; whereas the resultant rotational acceleration did not decrease significantly for both. In addition, average peak values of the resultant translational acceleration were tend to higher for Ouchi-gari than for Osoto-gari; however average peak values of the resultant rotational acceleration were adversely higher for Osoto-gari. The discrepancy is due to the difference in the recipient’s kinematics.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (6 results)

All 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Invited: 1 results)

  • [Journal Article] Rotational Acceleration During Head Impact Resulting from Different Judo Throwing Techniques.2014

    • Author(s)
      Murayama H, Hitosugi M, Motozawa Y, Ogino M, Koyama K
    • Journal Title

      Neurologia medico-chirurgica (Tokyo)

      Volume: 54(5) Pages: 374-378

    • NAID

      130004922251

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 背負投における頭頸部外傷発生メカニズムの生体力学的検討2015

    • Author(s)
      村山晴夫,一杉正仁,本澤養樹,荻野雅宏,小山勝弘
    • Organizer
      第70回日本体力医学会大会
    • Place of Presentation
      和歌山県民文化会館(和歌山県和歌山市)
    • Year and Date
      2015-09-18
    • Related Report
      2015 Annual Research Report
  • [Presentation] 柔道の受け身動作遂行時におけ頭部衝撃評価2015

    • Author(s)
      村山晴夫,一杉正仁,本澤養樹,小山勝弘
    • Organizer
      日本武道学会第48回大会
    • Place of Presentation
      日本体育大学(東京都世田谷区)
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] 受身がもたらす頭部への衝撃緩衝メカニズムを探る2015

    • Author(s)
      村山晴夫
    • Organizer
      日本武道学会第48回大会(柔道専門分科会)
    • Place of Presentation
      日本体育大学(東京都世田谷区)
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Biomechanical Analysis Of Head And Neck Motions In Thrown Person By Judo Technique, Seoi-nage.2015

    • Author(s)
      Haruo Murayama
    • Organizer
      American College of Sports Medicine 62nd Annual Meeting
    • Place of Presentation
      San Diego Convention Center (San Diego)
    • Year and Date
      2015-05-26 – 2015-05-30
    • Related Report
      2014 Research-status Report
  • [Presentation] 背負投における頭部衝撃時の生体力学応答2014

    • Author(s)
      村山晴夫
    • Organizer
      日本武道学会第47回大会
    • Place of Presentation
      福山市立大学(福島市)
    • Year and Date
      2014-09-10 – 2014-09-11
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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