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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2019 Oct 20;102:103504. doi: 10.1016/j.jmbbm.2019.103504

Figure 1.

Figure 1.

(Left) A custom-designed indentation device and the testing setup on muscle samples. The muscle sample was hydrated in a water bath (containing PBS and proteinase inhibitors) mounted on a ball head, which could be adjusted so that the indenter tip (1.6 mm diameter) was perpendicular to the muscle surface. The tip was lowered to contact the muscle surface using both coarse and fine adjustments. The piezoelectric actuator was instructed to apply a step load of 5mN, while the deformation history was monitored in real time. (Right) Bovine gastrocnemius muscle was glued on top of a rigid aluminum block with its center being indented vertically and the muscle fibers being arranged horizontally.