足関節と下腿の筋の粘弾性の解析

床反力計の上に立っているときに,下腿の筋に電気刺激を与えると重心(応力中心)がわずかに揺れます.この揺れを抽出して,電気刺激を入力,応力中心の揺らぎを出力としてシステム同定を行うと,足関節周りの粘弾性と,下腿の筋の粘弾性を同時に推定できます.

応力中心の揺らぎ.y軸が前後方向で+が前.

抽出した電気刺激による揺らぎとシステム同定で求めた伝達関数による近似

論文

  • T. Uchiyama, G. Kondo: Relationships among Electromyogram, Displacement and Velocity of the Center of Pressure, and Muscle Stiffness of the Medial Gastrocnemius Muscle during Quiet Standing, Adv. Biomed. Eng., Vol. 9, pp. 138–145, 2020
    DOI: 10.14326/abe.9.138

発表

  • M. Ishii and T. Uchiyama: Stiffness estimation of the vastus lateralis muscle in quiet standing, 第60回日本生体医工学会大会(2021)
  • M. Oda and T. Uchiyama: Dependency of the medial gastrocnemius muscle and ankle joint stiffness on the dorsiflexion angle, 第60回日本生体医工学会大会(2020)
  • T. Uchiyama, E. Hamada: Relationship between Medial Gastrocnemius Muscle Stiffness and the Angle between the Rearfoot and Floor. Proc. 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, pp 6860–6863, Berlin, 2019
    DOI: 10.1109/EMBC.2019.8856642
  • T. Uchiyama, A. Sugiyama: Muscle Stiffness Estimation Using Center of Pressure Fluctuations Induced by Electrical Stimulation. In: Lhotska L., Sukupova L., Lacković I., Ibbott G. (eds) World Congress on Medical Physics and Biomedical Engineering 2018. IFMBE Proceedings,  Vol. 68/2, pp. 569-572. Springer, Singapore
    DOI: 10.1007/978-981-10-9038-7_105