Uchiyama, Takanori

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics ( Yagami )

Position

Professor

E-mail Address

E-mail address

Related Websites

External Links
Scopus Paper Info  
Paper Count: 66 Citation Count: 248 h-index: 9

Click to view the Scopus page. The data was downloaded from Scopus API in April 26, 2026, via http://api.elsevier.com and http://www.scopus.com .

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Career 【 Display / hide 】

  • 1992.04
    -
    1997.03

    神戸大学工学部, 助手

  • 1997.04
    -
    1998.03

    慶應義塾大学理工学部, 助手

  • 1998.04
    -
    2003.03

    慶應義塾大学理工学部, 専任講師

  • 2003.04
    -
    2007.03

    慶應義塾大学理工学部, 助教授

  • 2007.04
    -
    2011.03

    慶應義塾大学理工学部, 准教授

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Academic Background 【 Display / hide 】

  • 1987.03

    Keio University, Faculty of Science and Engineering, 計測工学科

    University, Graduated

  • 1989.03

    Keio University, Graduate School, Division of Science and Engineeri, 計測工学専攻

    Graduate School, Completed, Master's course

  • 1992.03

    Keio University, Graduate School, Division of Science and Engineeri, 生体医工学専攻

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • PhD, Keio University, 1992.03

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Research Areas 【 Display / hide 】

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Measurement engineering

  • Life Science / Biomedical engineering

  • Life Science / Biomaterials

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Research Keywords 【 Display / hide 】

  • 生体計測

  • 筋電図

  • 筋音図

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Research Themes 【 Display / hide 】

  • 床反力計測による筋と関節の粘弾性推定, 

    2017.04
    -
    Present

  • System identification of mechanomyogram, 

    2005
    -
    Present

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Books 【 Display / hide 】

  • 筋肉研究最前線

    森谷　敏夫　他, NTS, 2019.09,  Page： 310

    Scope: 第6章　第4節　押し込み反力計測による筋硬度評価法の検討,  Contact page： 245-253

  • 生体システム工学の基礎

    FUKUOKA YUTAKA, UCHIYAMA TAKANORI, NOMURA TAISHIN, コロナ社, 2015.04

    Scope: 第4章

  • 日本語LaTeX2eインストールキット

    中野賢，淺山和典，内山孝憲, アスキー, 1997.11

    　View Summary

    科学技術論文向け日本語組版ソフトウエア日本語LaTeX2eの解説書

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Papers 【 Display / hide 】

  • Gastrocnemius muscle natural frequencies estimated from electrically induced mechanomyogram and anterior-posterior torque

    Takanori Uchiyama, Ryosei Kashiwaba

    Advanced Biomedical Engineering 15   280 - 290 2026.04

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted

  • Foot-cooling effects on muscle and joint stiffnesses during quiet standing

    Takanori Uchiyama, Natsumi Kaneko

    Advanced Biomedical Engineering 14   235 - 240 2025.05

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted

    　View Summary

    The purpose of this study was to clarify the effect of reducing somatosensory feedback by foot cooling on the medial gastrocnemius muscle. Using a system identification technique, we estimated the natural frequencies of the muscle and the ankle joint. The natural frequencies are proportional to the square root of the muscle and joint stiffnesses and indicate the frequency characteristics of quiet standing. We measured the center of pressure (COP) of eight young volunteers aged 22–24 years before and after foot-cooling by immersing the feet in water with ice. Electrical stimulation was applied to the medial gastrocnemius muscle, and electrically induced COP fluctuation was extracted using a Kalman filter and synchronously averaged based on the stimu-lation. The synchronously averaged COP fluctuation was considered an impulse response, and the transfer function was identified using a singular value decomposition method. The natural frequencies were estimated from the poles of the transfer functions. The natural frequencies of the muscle before foot cooling ranged from 1.96 to 3.09 Hz, and those after foot cooling decreased to a range of 1.40 to 2.19 Hz. There was a significant difference (p < 0.01) between the natural frequencies before and after foot cooling. The natural frequencies of the ankle joint tended to decrease after foot cooling, although the difference was not significant. The natural frequency of the medial gastrocnemius muscle decreased significantly when foot cooling reduced somatosen-sory feedback in the feet.

  • Estimation of ankle joint stiffness during quiet standing using only a force plate without perturbation

    Ryu Inoue, Takanori Uchiyama

    Advanced Biomedical Engineering 14   1 - 6 2025.01

    Research paper (scientific journal), Joint Work, Last author, Accepted

    　View Summary

    We investigated a system identification method for modeling the standing posture without external perturbation. Assuming that postural sway during quiet standing is caused by internal white noise, the method adopts an autocorrelation matrix consisting of body position and velocity parameters. We showed that the method can be applied to center-of-mass fluctuation measurement data. Since we used only a force plate to minimize the burden on the subjects, the velocity could not be measured directly. Therefore, we first demonstrated through simulation that ankle joint stiffness can be estimated by numerically deriving the velocity from the displacement. The velocity was calculated using the central difference approximation, and the ankle stiffness estimation error was obtained. The system identification method was then applied to the center-of-mass measurement data, and the ankle stiffness was estimated. Simulations showed that even when the velocity was calculated through numerical differentiation, the ankle joint stiffness could still be estimated with an accuracy of less than 1% error. The ankle stiffness estimated from the measured center of mass was slightly higher than the gravitational torque coefficient, but lower than that obtained in our previous electrical stimulation study (Uchiyama T: Adv Biomed Eng. 13, 223‒229, 2024). This suggests that the control method for ankle stiffness may depend on the presence or absence of external disturbances.

  • Modeling of electrically induced floor reaction torque during quiet standing and estimation of ankle joint stiffness

    Takanori Uchiyama

    Advanced Biomedical Engineering 13   223 - 229 2024.05

    Research paper (scientific journal), Single Work, Lead author, Last author, Corresponding author, Accepted

    　View Summary

    Standing posture is stabilized by a control mechanism involving the stiffness of the ankle joint. Ankle joint stiffness has previously been studied by measuring the electrically induced fluctuation of the center of pressure. However, the fluctuation is a complex output of a neuromuscular system and a measurement system, and its mechanism has therefore remained unclear. The purpose of this study was to construct a model of the process leading from electrical stimulation to floor reaction torque and to estimate net ankle joint stiffness. The model consisted of an inverted pendulum with a Hill-type muscle model and was described by a state equation that was solved using the Runge‒Kutta method. Some of the model parameters were derived from the physical characteristics of the participants. Unknown parameters were estimated using a nonlinear least squares method by comparing the model torque with the experimental torque. The experimental torque was well reproduced using the model. The stiffness of the ankle joint (passive and active) was 627–944 Nm/rad, which was able to stabilize the standing posture.

  • 筋長－張力関係の下行脚における静的位置制御機構の実験的・理論的構築　－力・位置制御における運動単位活動の計測と筋モデルを用いた解析－

    赤澤堅造,奥野竜平,内山孝憲

    バイオメカニズム 26   43 - 52 2023.07

    Research paper (scientific journal), Joint Work, Last author, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • 押し込み型の硬度計

    UCHIYAMA TAKANORI/NAGAOKA MANABU

    バイオメカニズム学会誌 40 ( 2 ) 92 - 102 2016.05

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

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Presentations 【 Display / hide 】

  • 静止立位における足関節左右方向の外部摂動を用いない弾性推定

    髙橋英太郎, 内山孝憲

    [Domestic presentation]  日本生体医工学会関東支部若手研究者発表会２０２５ (明治大学生田キャンパス) , 

    2025.11
    , 

    Oral presentation (general), 日本生体医工学会関東支部

  • つま先立ちにおける足関節の弾性の推定

    洞口陸, 内山孝憲

    [Domestic presentation]  日本生体医工学会関東支部若手研究者発表会２０２５ (明治大学生田キャンパス) , 

    2025.11
    , 

    Oral presentation (general), 日本生体医工学会関東支部

  • Construction of dynamic muscle model using static relationship between electromyogram and contraction force

    K. Maeyama, T. Uchiyama

    [Domestic presentation]  第64回日本生体医工学会大会 (福井) , 

    2025.06
    , 

    Poster presentation

  • Estimation of vascular viscoelastic properties by measuring photoelectric pulse waves at the finger and wrist

    T. Uchiyama, T. Goto

    [Domestic presentation]  第64回日本生体医工学会大会 (福井) , 

    2025.06
    , 

    Poster presentation

  • Identification of a center-of-mass fluctuation system driven by internal noise during quiet standing

    Ryu Inoue, Takanori Uchiyama

    [Domestic presentation]  生体医工学シンポジウム2024, 

    2024.09
    , 

    Poster presentation

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • Stiffness estimation of ankle joint and leg muscles during quiet standing

    2019.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

  • Control mechanisum of muscle stiffness and viscosity in walking

    2015.04
    -
    2018.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

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Works 【 Display / hide 】

  • Source code of the ankle stiffness estimation from the center of pressure fluctuation measured with a force plate

    Takanori Uchiyama. Ryu Inoue

    J-STAGE Data, Japanese Society for Medical and Biological Engineering, 

    2025.04
    -
    Present
    , 

    Software, Joint

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Awards 【 Display / hide 】

  • 2016年度計測自動制御学会著述賞

    福岡豊/内山孝憲/野村泰伸, 2016.09, 公益社団法人計測自動制御学会, 生体システム工学の基礎

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • 2016年度計測自動制御学会論文賞

    Takanori Uchiyama/Takahiro Tamura, 2016.09, 公益社団法人計測自動制御学会, System Identification of Mechanomyogram at Various Levels of Motor Unit Recruitment

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • 科学新聞賞

    内山 孝憲, 1998.05

  • 日本ME学会 論文賞阪本賞

    内山 孝憲, 1998.05, 日本ME学会

  • バイオメカニズム学会 奨励賞

    内山 孝憲, 1997.11, バイオメカニズム学会

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Courses Taught 【 Display / hide 】

  • DIGITAL FUNDAMENTALS

    2026

  • APPLIED PHYSICS AND PHYSICO-INFORMATIC PRACTICAL RESEARCH A

    2026

  • APPLIED PHYSICS AND PHYSICO-INFORMATICS LABORATORY C

    2026

  • INDEPENDENT STUDY ON FUNDAMENTAL SCIENCE AND TECHNOLOGY

    2026

  • PRESENTATION TECHNIQUE

    2026

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Courses Previously Taught 【 Display / hide 】

  • 物理情報数学B

    Keio University

    2018.04
    -
    2019.03
    , 

    Spring Semester, Lecture, Within own ｆaculty

    線形代数

  • 物理情報工学実験CD

    Keio University

    2018.04
    -
    2019.03
    , 

    Autumn Semester, Laboratory work/practical work/exercise, Within own ｆaculty

  • バイオシステム

    Keio University

    2018.04
    -
    2019.03
    , 

    Autumn Semester, Lecture

  • 生体制御

    Keio University

    2018.04
    -
    2019.03
    , 

    Spring Semester, Lecture, Within own ｆaculty

  • デジタル基礎

    Keio University

    2018.04
    -
    2019.03
    , 

    Spring Semester, Lecture, Within own ｆaculty

    論理回路

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Social Activities 【 Display / hide 】

  • 医療機器センター

    2006.07
    -
    2012.03
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Memberships in Academic Societies 【 Display / hide 】

  • 電子情報通信学会, 

    2006.11
    -
    Present

  • IEEE, 

    1996.06
    -
    Present

  • 電気学会, 

    1996.04
    -
    Present

  • バイオメカニズム学会, 

    1995.05
    -
    Present

  • 日本機械学会, 

    1994.06
    -
    2021.12

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Committee Experiences 【 Display / hide 】

  • 2026.09

    生体医工学会シンポジウム2026副編集委員長, 日本生体医工学会

  • 2018.04
    -
    Present

    評議員, バイオメカニズム学会

  • 2018.03
    -
    2021.02

    論文集委員会委員, 計測自動制御学会

  • 2017.04
    -
    2018.03

    編集委員会副委員長, バイオメカニズム学会

  • 2016.09
    -
    Present

    編集委員会委員, 日本生体医工学会

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