1. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 A schematic view of the constitutive model selection process, comprising an “inner loop” for material parameter fitting and an “outer loop” for constitutive law adjustments Figure Legend:

2. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 General rheological arrangement comprising three parallel networks of increasing complexity Figure Legend:

3. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Indentation response of perfused porcine liver in indentation. A continuous segment of cyclic load/unload ramps at four different rates is shown at the top. The corresponding stress-strain response is shown in the middle with individual displacement ramps distinguished by color. The stress relaxation response is shown at the bottom. All data were collected at the same location on the same liver specimen, allowing 30 min of recovery between the cyclic tests and the stress relaxation. Figure Legend:

4. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Configuration 1 (three material parameters): linear elastic element (2A), linear back stress elastic element (2B), and linear dashpot (2C). Material parameters are listed in Table. Figure Legend:

5. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Configuration 2 (four material parameters): exponential elastic element (2A), linear back stress elastic element (2B), and linear dashpot (2C). Material parameters are listed in Table. Figure Legend:

6. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Configuration 3 (six material parameters): exponential elastic element (2A), linear back stress elastic element (2B), and nonlinear viscous power law dashpot with reptation-limited flow (2C). Material parameters are listed in Table. Figure Legend:

7. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Configuration 4 (eight material parameters): exponential elastic element (3A), nonlinear viscous power law dashpot with reptation- limited flow (3C), and time-dependent back stress in SLS arrangement (3B, 3D, and 3E). Material parameters are listed in Table. Figure Legend:

8. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Brain tissue in ex vivo uniaxial compression (eight material parameters): exponential elastic element (3A), nonlinear viscous power law dashpot with reptation-limited flow (3C), and time-dependent back stress in SLS arrangement (3B, 3D, and 3E). Material parameters listed in Table. Figure Legend:

9. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Identifying a Minimal Rheological Configuration: A Tool for Effective and Efficient Constitutive Modeling of Soft Tissues J Biomech Eng. 2011;133(4):041006-041006-11. doi:10.1115/1.4003620 Cervical tissue in uniaxial compression (six material parameters): exponential elastic element (2A), linear back stress elastic element (2B), and nonlinear viscous power law dashpot with reptation-limited flow (2C). Material parameters are listed in Table. Figure Legend: