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Simulation of the Mechanical Behavior of White Matter Using a Micromechanics Finite Element Method

Published online by Cambridge University Press:  21 March 2011

Yi Pan ,
Assimina A. Pelegri  and
David I. Shreiber
Yi Pan
Affiliation:
Department of Mechanical and Aerospace Engineering, Rutgers, the State University of New Jersey, 98 Brett Rd., Piscataway, NJ 08854, U.S.A.
Assimina A. Pelegri
Affiliation:
Department of Mechanical and Aerospace Engineering, Rutgers, the State University of New Jersey, 98 Brett Rd., Piscataway, NJ 08854, U.S.A.
David I. Shreiber
Affiliation:
Department of Biomedical Engineering, Rutgers, the State University of New Jersey, 599 Taylor Rd., Piscataway, NJ 08854, U.S.A.
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Abstract

The atypical mechanical behavior of white matter and its influence on the mechanical properties of brain tissue necessitate adoption of a mutli-scale model of white matter for accurate computational analysis. Herein, we present a micromechanical analysis coupled with finite elements into a biomechanical interacting model of white matter. A representation of the white matter of central nervous system is identified and its microstructure is generated. The geometric descriptions of the axon and the surrounding matrix are obtained from neurofilament immunohistochemistry images. Consecutively, linear elastic material constitutive models are applied to describe the behavior of axons and their surrounding matrix subjected to small deformations. This model facilitates determination of the tissue’s stress and strain fields, and enables an understanding of the effects of axon undulation on local fields. The fundamental nature of the model enables future scale-up for structural tissue analysis and predictions of axon damage at the microscale.

Keywords

tissuecompositebiological
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1301: Symposium V/NN/OO/PP – Soft Matter, Biological Materials and Biomedical Materials—Synthesis, Characterization and Applications , 2011 , mrsf10-1301-oo04-03
Copyright
Copyright © Materials Research Society 2011

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References

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