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 language | English |
|---|---|
| Title of host publication | IFMBE Proceedings |
| Pages | 472-475 |
| Number of pages | 4 |
| Volume | 25 |
| Edition | 4 |
| DOIs | |
| Publication status | Published - 2009 |
| Event | World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics - Munich, Germany Duration: Sep 7 2009 → Sep 12 2009 |
Other
| Other | World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics |
|---|---|
| Country | Germany |
| City | Munich |
| Period | 9/7/09 → 9/12/09 |
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Keywords
- α-motoneuron
- Model
- Pendulum test
- Simulation
- Spasticity
- Viscosity
ASJC Scopus subject areas
- Biomedical Engineering
- Bioengineering
Cite this
A detailed model for knee joint acceleration motions obtained by pendulum test. / Jikuya, Kazuaki; Michinishi, H.; Nakamura, Takao; Kusuhara, Toshimasa; Yamamoto, Y.; Okamoto, T.
IFMBE Proceedings. Vol. 25 4. ed. 2009. p. 472-475.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A detailed model for knee joint acceleration motions obtained by pendulum test
AU - Jikuya, Kazuaki
AU - Michinishi, H.
AU - Nakamura, Takao
AU - Kusuhara, Toshimasa
AU - Yamamoto, Y.
AU - Okamoto, T.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - α-motoneuron
KW - Model
KW - Pendulum test
KW - Simulation
KW - Spasticity
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=77950104696&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77950104696&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-03882-2-125
DO - 10.1007/978-3-642-03882-2-125
M3 - Conference contribution
AN - SCOPUS:77950104696
SN - 9783642038815
VL - 25
SP - 472
EP - 475
BT - IFMBE Proceedings
ER -