Journal
JOURNAL OF BIOMECHANICS
Volume 40, Issue 1, Pages 117-124Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2005.11.004
Keywords
brain tissues; white matter; unconfined compression; poroviscoelastic; stress relaxation
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The porous properties of brain tissue are important for understanding normal and abnormal cerebrospinal fluid flow in the brain. In this study, a poroviscoelastic model was fitted to the stress relaxation response of white matter in unconfined compression performed under a range of low strain rates. A set of experiments was also performed on the tissue samples using a no-slip boundary condition. Results from these experiments demonstrated that the rheological response of the white matter is primarily governed by the intrinsic viscoelastic properties of the solid phase. The permeability of white matter was found to be of the order of 10(-12) m(4)/Ns. (c) 2005 Elsevier Ltd. All rights reserved.
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