Abstract
Functional electrical stimulation is used to restore movement and function of paralyzed muscles by activating skeletal muscle artificially. An accurate and predictive mathematical model can facilitate the design of stimulation patterns that produce the desired force. The present study is a first step in developing a mathematical model for non-isometric muscle contractions. The goals of this study were to: (1) identify how our isometric force model's parameters vary with changes in knee joint angle, (2) identify the best knee flexion angle to parameterize this model, and (3) validate the model by comparing experimental data to predictions in response to a wide range of stimulation frequencies and muscle lengths. Results showed that by parabolically varying one of the free parameters with knee joint angle and fixing the other parameters at the values identified at 40° of knee flexion, the model could predict the force responses to a wide range of stimulation frequencies and patterns at different muscle lengths. This work showed that the current isometric force model is capable of predicting the changes in skeletal muscle force at different muscle lengths.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 919-930 |
| Number of pages | 12 |
| Journal | Journal of Biomechanics |
| Volume | 35 |
| Issue number | 7 |
| DOIs | |
| State | Published - 2002 |
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Keywords
- Catch-like property
- Frequency
- Functional electrical stimulation
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
Cite this
Modeling the length dependence of isometric force in human quadriceps muscles. / Perumal, Ramu; Wexler, Anthony S.; Ding, Jun; Binder-Macleod, Stuart A.
In: Journal of Biomechanics, Vol. 35, No. 7, 2002, p. 919-930.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modeling the length dependence of isometric force in human quadriceps muscles
AU - Perumal, Ramu
AU - Wexler, Anthony S.
AU - Ding, Jun
AU - Binder-Macleod, Stuart A.
PY - 2002
Y1 - 2002
N2 - Functional electrical stimulation is used to restore movement and function of paralyzed muscles by activating skeletal muscle artificially. An accurate and predictive mathematical model can facilitate the design of stimulation patterns that produce the desired force. The present study is a first step in developing a mathematical model for non-isometric muscle contractions. The goals of this study were to: (1) identify how our isometric force model's parameters vary with changes in knee joint angle, (2) identify the best knee flexion angle to parameterize this model, and (3) validate the model by comparing experimental data to predictions in response to a wide range of stimulation frequencies and muscle lengths. Results showed that by parabolically varying one of the free parameters with knee joint angle and fixing the other parameters at the values identified at 40° of knee flexion, the model could predict the force responses to a wide range of stimulation frequencies and patterns at different muscle lengths. This work showed that the current isometric force model is capable of predicting the changes in skeletal muscle force at different muscle lengths.
AB - Functional electrical stimulation is used to restore movement and function of paralyzed muscles by activating skeletal muscle artificially. An accurate and predictive mathematical model can facilitate the design of stimulation patterns that produce the desired force. The present study is a first step in developing a mathematical model for non-isometric muscle contractions. The goals of this study were to: (1) identify how our isometric force model's parameters vary with changes in knee joint angle, (2) identify the best knee flexion angle to parameterize this model, and (3) validate the model by comparing experimental data to predictions in response to a wide range of stimulation frequencies and muscle lengths. Results showed that by parabolically varying one of the free parameters with knee joint angle and fixing the other parameters at the values identified at 40° of knee flexion, the model could predict the force responses to a wide range of stimulation frequencies and patterns at different muscle lengths. This work showed that the current isometric force model is capable of predicting the changes in skeletal muscle force at different muscle lengths.
KW - Catch-like property
KW - Frequency
KW - Functional electrical stimulation
UR - http://www.scopus.com/inward/record.url?scp=0036269416&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036269416&partnerID=8YFLogxK
U2 - 10.1016/S0021-9290(02)00049-0
DO - 10.1016/S0021-9290(02)00049-0
M3 - Article
C2 - 12052394
AN - SCOPUS:0036269416
VL - 35
SP - 919
EP - 930
JO - Journal of Biomechanics
JF - Journal of Biomechanics
SN - 0021-9290
IS - 7
ER -