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Viscoelastic Properties of the Rat Brain in the Sagittal Plane: Effects of Anatomical Structure and Age

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An Erratum to this article was published on 01 March 2012

Abstract

Rat is the most commonly used animal model for the study of traumatic brain injury. Recent advances in imaging and computational modeling technology offer the promise of biomechanical models capable of resolving individual brain structures and offering greater insight into the causes and consequences of brain injury. However, there is insufficient data on the mechanical properties of brain structures available to populate these models. In this study, we used microindentation to determine viscoelastic properties of different anatomical structures in sagittal slices of juvenile and adult rat brain. We find that the rat brain is spatially heterogeneous in this anatomical plane supporting previous results in the coronal plane. In addition, the brain becomes stiffer and more heterogeneous as the animal matures. This dynamic, region-specific data will support the development of more biofidelic computational models of brain injury biomechanics and the testing of hypotheses about the manner in which different anatomical structures are injured in a head impact.

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Acknowledgments

The authors wish to thank Dr. Ed X. Guo for laboratory space and equipment. This study was supported by NHTSA Project # DTNH22-08-C-00088.

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Authors and Affiliations

  1. Neurotrauma and Repair Laboratory, Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace, 1210 Amsterdam Avenue MC 8904, New York, NY, 10027, USA

    John D. Finan, Benjamin S. Elkin, Erica M. Pearson, Irene L. Kalbian & Barclay Morrison III

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  1. John D. Finan
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  2. Benjamin S. Elkin
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  3. Erica M. Pearson
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  4. Irene L. Kalbian
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  5. Barclay Morrison III
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Correspondence to Barclay Morrison III.

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Associate Editor Stefan M. Duma oversaw the review of this article.

An erratum to this article can be found at http://dx.doi.org/10.1007/s10439-012-0537-0.

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Finan, J.D., Elkin, B.S., Pearson, E.M. et al. Viscoelastic Properties of the Rat Brain in the Sagittal Plane: Effects of Anatomical Structure and Age. Ann Biomed Eng 40, 70–78 (2012). https://doi.org/10.1007/s10439-011-0394-2

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