Linear viscoelastic properties of bovine brain tissue in shear.
We report the results from a series of rheological tests of fresh bovine brain tissue. Using a standard Bohlin VOR shear rheometer, shear relaxation and oscillating strain sweep experiments were performed on disks of brain tissue 30 mm in diameter, with a thickness of 1.5-2 mm. The strain sweep experiment showed that the viscoelastic strain limit is of the order of 0.1% strain. Shear relaxation data do not indicate the presence of a long-term elastic modulus, indicating fluid-like behavior. A relaxation spectrum was calculated by inverting the experimental data and used to predict oscillatory response, which agreed well with measured data.
Bilston
L E
LE
Department of Mechanical and Mechatronic Engineering, University of Sydney, New South Wales, Australia. bilston@mech.eng.usyd.edu.au
Liu
Z
Z
Phan-Thien
N
N
D000818:Animals; D001921:Brain / Q000502:physiology*; D002417:Cattle; D004548:Elasticity; D012212:Rheology; D013314:Stress, Mechanical; D014783:Viscosity