Research Article
Influences of Desmin and Keratin 19 on Passive Biomechanical Properties of Mouse Skeletal Muscle
Table 1
Summary and explanation of biomechanical parameters.
| Parameter (units) | Symbol | Formula | Lay description of parameter and relevance |
| Force (N) | | — | Nonnormalized force | Undeformed fiber length (m) | | — | Initial knot-knot fiber length | Undeformed diameter (m) | | — | Initial fiber diameter | Undeformed area (m2) | | — | Initial fiber cross-sectional area | Deformed fiber length (m) | | — | Fiber length following longitudinal deformation | Deformed diameter (m) | | — | Fiber diameter following longitudinal deformation | Deformed area (m2) | | — | Fiber cross-sectional area following longitudinal deformation | Longitudinal fiber strain (dimensionless) | | | Normalized longitudinal deformation—percentage fiber extension | Fiber volume | | | Fiber volume after deformation, assuming a cylindrical geometry | Radial strain (dimensionless) | | | Normalized lateral deformation—percentage reduction in fiber diameter following longitudinal deformation; increased radial strain represents stronger coupling between longitudinal and lateral responses. | Cauchy (true) stress (Pa) | σ C | | Force normalized to deformed area—couples force generation to changes in 3D-fiber geometry | LaGrangian stress (Pa) | σ
LG | | Force normalized to undeformed area—measure of inherent load-bearing ability, decoupled from changes in 3D-fiber geometry | Poisson’s ratio (dimensionless) | | | Measure of relation between longitudinal strain and radial strain—lateral strain transmission |
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