MECHANICS OF INJURY TO MUSCLE FIBERS

Author:

GAO YINGXIN1,WAAS ANTHONY M.2,WINEMAN ALAN S.1

Affiliation:

1. Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan, USA

2. Department of Aerospace Engineering, University of Michigan, Ann Arbor, Michigan, USA

Abstract

An advanced shear lag model is developed to analyze the stress-shielding effect in injured muscle fiber by introducing the activation strain. The model considers three muscle fibers connected by the endomysium with the middle muscle fiber injured. Stress shielding describes the function of the lateral transmission of force in protecting the injured muscle fibers from being further injured by transferring force in the injured muscle fiber to its adjacent muscle fibers. Parameter studies demonstrate that the mechanical and geometrical properties of muscle fibers and the endomysium as well as the degree of injury can affect the stress-shielding effect. In conclusion, the model successfully demonstrates and captures, at least in a qualitative manner, the lateral transmission of force between an injured and a normal muscle fiber.

Publisher

World Scientific Pub Co Pte Lt

Subject

Biomedical Engineering

Reference26 articles.

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