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Table 1 Parameters used for the nonlinear model as the initial values for the optimization process.

From: Data-guide for brain deformation in surgery: comparison of linear and nonlinear models

Instantaneous Response Characteristic Time Characteristic Time
C100 = 263 (Pa) τ1 = 0.5 (s) τ2 = 50 (s)
C010 = 263 (Pa)   
C110 = 0 (Pa) Instantaneous Elasticity Instantaneous Elasticity
C020 = 491 (Pa) g1 = 0.450 g2 = 0.365
C200 = 491 (Pa)