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
- R. Inoue, T. Uchiyama: Estimation of ankle joint stiffness during quiet standing using only a force plate without perturbation, Adv. Biomed. Eng., Vol. 14, pp. 1-6, 2025.
DOI: 10.14326/abe.14.1 - T. Uchiyama: Modeling of electrically induced floor reaction torque during quiet standing and estimation of ankle joint stiffness, Adv. Biomed. Eng., Vol. 13, pp. 223–229, 2024
DOI: 10.14326/abe.13.223 - 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
- R. Inoue, T. Uchiyama, Identification of a center-of-mass fluctuation system driven by internal noise during quiet standing, 生体医工学シンポジウム2024 (2024)
- K. Ishiwata, T. Uchiyama: Relationship between the force induced by the heartbeat and the center of pressure fluctuation of the trunk and lower limbs in the sitting posture, 第63回日本生体医工学会大会(2024)
- R. Inoue, T. Uchiyama: Identification of center of mass fluctuation system driven by internal noise during quiet standing, 第63回日本生体医工学会大会(2024)
- M. Saito, T. Uchiyama, Measurement of mechanomyogram in quiet standing using a laser displacement meter and its system identification, The 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Sydney (2023)
- M. Saito, T. Uchiyama: Measurement of mechanomyogram in quiet standing using a laser displacement meter and its system identification, 第62回日本生体医工学会大会(2023)
- T. Uchiyama, H. Muto, D. Urushido: Stiffness of the gastrocnemius muscle and ankle joint under a cooling condition, 第61回日本生体医工学会大会(2022)
- K. Aoki, T. Uchiyama: Relationship between the center of pressure and thickness of the tibialis anterior muscle during quiet standing, 第61回日本生体医工学会大会(2022)
- 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(2021)
- 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