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TECHNICAL PAPERS

Regional, Directional, and Age-Dependent Properties of the Brain Undergoing Large Deformation

[+] Author and Article Information
Michael T. Prange, Susan S. Margulies

Department of Bioengineering, University of Pennsylvania, 3320 Smith Walk, Philadelphia, PA 19104-6392

J Biomech Eng 124(2), 244-252 (Mar 29, 2002) (9 pages) doi:10.1115/1.1449907 History: Received October 17, 2000; Revised October 25, 2001; Online March 29, 2002
Copyright © 2002 by ASME
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References

Figures

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Anatomic locations and test directions (D1= direction 1, D2=direction 2) of (a) adult gray matter sample and (b) adult corona radiata sample shown in coronal section (left) and sagittal section (right). Anatomic location of (c) adult corpus callosum sample shown in transverse section (left) and sagittal section (right). Anatomic locations and test direction of (d) five-day and four-week old mixed white/gray matter samples shown in coronal section (left) and sagittal section (right).
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Representative histology slides of control tissue (a) and strained (50 percent) tissue (b).
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Long-term shear moduli of first and final 5 percent shear strain tests (line has slope=1).
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Typical nonlinear regression to determine the constant α. Data shown for 1 sample.
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Time-dependent Ogden parameter μ for human and porcine gray matter (error bars indicate 95 percent confidence interval)
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Age-dependent properties. Time-dependent Ogden component μ for five-day old piglet, four-week old piglet, and average adult porcine white and gray matter properties (error bars indicate 95 percent confidence interval)
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Regional properties. Time-dependent Ogden component μ for corona radiata (c.r.), corpus callosum (c.c.), and gray matter (error bars indicate 95 percent confidence interval).
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Directional properties. Time-dependent Ogden component μ for gray matter (error bars indicate 95 percent confidence interval).
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Directional properties. Time-dependent Ogden component μ for white matter regions corona radiata (c.r.) and corpus callosum (c.c.) (error bars indicate 95 percent confidence interval).
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Directional properties. Direction ratio (D1/D2) or gray matter, corona radiata (c.r.) and corpus callosum (c.c.).
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Long-term stress of unconfined compression experiments compared to prediction of Ogden material model
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Prediction of linear fifth-order Maxwell model
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Prediction of Ogden hyperelastic model modified to include dissipation

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