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JRM Vol.20 No.6 pp. 863-871
doi: 10.20965/jrm.2008.p0863
(2008)

Paper:

Muscle Strength Estimation Using Musculo-Skeletal Model for Upper Limb Rehabilitation

Tatsuya Okada*, Takashi Imamura*, Takanori Miyoshi*,
Kazuhiko Terashima*, Yoshifumi Yasuda**,
and Takuo Suzuki*

*Department of Production Systems Engineering, Toyohashi University of Technology

**Health Science Center, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan

Received:
April 2, 2008
Accepted:
June 29, 2008
Published:
December 20, 2008
Keywords:
Musculo-skeletal model, EMG, MRI, muscle strength, output force
Abstract

This article proposes a new muscle strength estimation method for upper limbs. It uses an inverse model of a musculo-skeletal model based on the muscle force applied on joints as well as the arrangement of the muscles. We did basic analyses of the parameters of the shape of a living body from magnetic resonance imaging (MRI) images and electromyography (EMG) in order to express isometric motion using the musculo-skeletal model. The model shows high reproducibility of a living body’s isometric motion. We propose two easy methods of estimating muscle strength without optimization calculations and using a model which is the inverse of the musculo-skeletal model: a method based on output force distribution and a method based on joint torque distribution. We have validated them via experiments.

Cite this article as:
Tatsuya Okada, Takashi Imamura, Takanori Miyoshi,
Kazuhiko Terashima, Yoshifumi Yasuda, and
and Takuo Suzuki, “Muscle Strength Estimation Using Musculo-Skeletal Model for Upper Limb Rehabilitation,” J. Robot. Mechatron., Vol.20, No.6, pp. 863-871, 2008.
Data files:
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