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The coordinated exertion of force is associated the excitability of the spinal motor neurons

Research Project

Project/Area Number 17K13129
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Developmental mechanisms and the body works
Research InstitutionUniversity of Marketing and Distribution Sciences

Principal Investigator

SEKI Kazutoshi  流通科学大学, 人間社会学部, 准教授 (30552210)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords力発揮調整能 / 脊髄α運動ニューロン / 運動習慣 / 加齢 / F波出現頻度 / 力発揮調節能 / F波
Outline of Final Research Achievements

The purpose of this study was to clarify that the excitability of the spinal α-motor neurons associated with force adjustment based on 1) exercise habits and 2) aging.
The effects of exercise habits and aging were observed in each case the following conditions: 1) an isometric muscle strength maintenance task, 2) a gradual muscle strength increase/decrease task, and 3) task to perform gripping exercise after increasing or decreasing the force after isometric gripping exercise. The F-wave appearance frequency was higher in the group without exercise habits than the group with exercise habits, additionally in the elderly group compared to the young group. In addition, the F-wave appearance frequency appearance after exercise returned to rest level in the younger group, however, the excitability of the spinal α-motor neurons remained high in the elderly group. These results suggested that exercise habits and aging affect the excitability of the spinal α-motor neurons.

Academic Significance and Societal Importance of the Research Achievements

力発揮の調整能力およびそれらを制御する運動神経の働きは、①一定筋力維持や②筋力の漸増・漸減および③一定筋力の維持から筋力の増大・減少課題において、各々運動習慣や加齢による差が観察された。また、力発揮直後においても運動習慣の有無、加齢の影響を受けることが明らかになった。特に、運動習慣の有無に限らず、高齢者は若年者と比べて、力発揮直後に、安静レベルまで運動神経の働きが戻らず、残存することが明らかとなった。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2019 2018

All Presentation (4 results)

  • [Presentation] 握力の漸増漸減が力発揮調整能と誘発筋電図 F波に及ぼす影響2019

    • Author(s)
      関 和俊、高原 皓全、山口 英峰、小野寺 昇
    • Organizer
      第83回日本体力医学会中国・四国地方会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 加齢差と運動習慣の有無が握力の漸増漸減時における力発揮調整能と誘発筋電図F波に及ぼす影響2019

    • Author(s)
      関 和俊、高原 皓全、山口 英峰、小野寺 昇
    • Organizer
      第27回日本運動生理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 加齢差と運動習慣の有無が力発揮調節能と誘発筋電図F波に及ぼす影響2019

    • Author(s)
      関 和俊、高原 皓全、山口 英峰、小野寺 昇
    • Organizer
      第74回日本体力医学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 運動習慣の有無が力発揮調節能と誘発筋電図F波に及ぼす影響2018

    • Author(s)
      関和俊、高原皓全、山口英峰、小野寺昇
    • Organizer
      第73回日本体力医学会大会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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