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Typical tensile stress-strain curve of the vocal fold along the anterior-posterior direction during loading and unloading at 1 Hz. The slope of the tangent line (dashed lines) to the stress-strain curve quantifies the tangent stiffness. The stress is typically higher during loading than unloading due to the viscous behavior of the vocal folds. The curve was obtained by averaging data over 30 cycles after a 10-cycle preconditioning.
