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Model-Based Approach for Quantitative Evaluation of Spasticity

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Abstract:

In the present clinical fields, medical doctors mainly use Modified Ashworth Scale (MAS) to evaluate spasticity. However, MAS is manual and qualitative method and results depend on doctors. The purpose of this paper is to propose a method to quantitatively evaluate spasticity using a neuro-musculo-skeletal model. The proposed model consisted of the muscular activation model, variable viscoelastic model of the muscles, musculoskeletal model, muscle spindle model and alpha motoneuron model. This model could represent spasticity patient’s knee pendulum well. A parameter related with sensitivity of the muscle spindle was a factor to evaluate spasticity quantitatively.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

1066-1069

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.1066

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Online since:

October 2006

Authors:

Kazunori Hase, Norimasa Adachi, Goro Obinata, Gwang Moon Eom, Chul Seung Kim, Se Jin Kong

Keywords:

Computer Simulation, Modified Ashworth Scale (MAS), Muscle Spindle, Neuro-Musculo-Sketelal Model, Pendulum Test, Quantitative Evaluation, Spasticity

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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[10] [20] [30] [40] [50] Knee Angle [deg] Time [s] =0. 01 =1 =100 vτ vτ vτ Fig. 4 Simulation results of the pendulum motion when the model parameter vτ in the muscle spindle was changed.

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[50] 100 150 200 Vastus Muscule Force [N] Time [s] Fig. 3 Muscle force at the vastus computed by the model.

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