2019 Fiscal Year Final Research Report
Neuromechanical analysis of control mechanism during human gait initiation and termination
| Project/Area Number |
17K13016
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Biomedical engineering/Biomaterial science and engineering
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | 運動制御 / 姿勢制御 / 間欠制御 / ニューロメカクス / 歩行開始 / 歩行停止 |
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| Outline of Final Research Achievements |
In this study, aiming at elucidating control mechanism of human bipedal motion (e.g. quiet standing, bipedal walking), we studied the control of human gait initiation and termination. We analyzed human quiet standing posture, normal speed bipedal walking, and very slow speed bipedal walking. We found that there is discontinuity in control mechanism through quiet standing to normal speed walking. In addition, we analyzed mathematical model of human bipedal walking, and developed/simulated dynamics of transition process between quiet standing and bipedal walking (gait initiation/termination). From the numerical analysis, it was shown that control mechanism which utilize advantage of passive dynamics might be used to succeed the gait termination. These findings indicate that gait initiation and gait termination are transition process between bipedal motions which require different control mechanisms, and skillful usage of passive dynamics is required to succeed the appropriate transition.
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| Free Research Field |
生体医工学
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| Academic Significance and Societal Importance of the Research Achievements |
ヒトの静止立位姿勢を歩行速度が零となる極限であると捉えることで，両者はしばしば同一の枠組みの中で議論される．しかしながら，立位姿勢維持と通常歩行運動では必要とされる安定性が本質的に異なるとの見方もある．本研究では，両者の遷移動作である歩行開始および歩行停止動作における制御メカニズムを研究し，立位と歩行の不連続性を明らかにするとともに，遷移動作の制御における，身体の機械力学的特性を巧みに利用することの重要性を明らかにした．本研究で得られた知見は，ヒト運動制御メカニズムの本質を探るうえで大変有用であると考えられる．
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