A detailed model for knee joint acceleration motions obtained by pendulum test

Kazuaki Jikuya, H. Michinishi, T. Nakamura, T. Kusuhara, Y. Yamamoto, T. Okamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes a detailed model (pendulum test model) to be able to utilize for simulations of knee joint motions obtained by pendulum test. First, we construct a simple pendulum test model based on existing organ models and clarify from the simulation results by the use of the model that there exist two difficulties impairing its accuracy. Next, in order to overcome them, we add two functions to some of the organ models in the simple pendulum test model. One is a function that the muscle viscosity in the muscle model changes nonlinearly according to dynamic state transition of actin/myosin. The other is a function that the threshold value of the firing in the α-motoneuron model slightly decreases in the early stage of the pendulum test by the amount proportional to the total of the first burst firing. Finally, we confirm from simulations of knee joint motions measured experimentally that the improved pendulum test model has an excellent performance of accuracy. The model will be very useful for estimation of spasticity.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationImage Processing, Biosignal Processing, Modelling and Simulation, Biomechanics
Pages472-475
Number of pages4
Edition4
DOIs
Publication statusPublished - Dec 1 2009
EventWorld Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics - Munich, Germany
Duration: Sep 7 2009Sep 12 2009

Publication series

NameIFMBE Proceedings
Number4
Volume25
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics
CountryGermany
CityMunich
Period9/7/099/12/09

Keywords

  • Model
  • Pendulum test
  • Simulation
  • Spasticity
  • Viscosity
  • α-motoneuron

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

Fingerprint Dive into the research topics of 'A detailed model for knee joint acceleration motions obtained by pendulum test'. Together they form a unique fingerprint.

  • Cite this

    Jikuya, K., Michinishi, H., Nakamura, T., Kusuhara, T., Yamamoto, Y., & Okamoto, T. (2009). A detailed model for knee joint acceleration motions obtained by pendulum test. In World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics (4 ed., pp. 472-475). (IFMBE Proceedings; Vol. 25, No. 4). https://doi.org/10.1007/978-3-642-03882-2-125