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. 2020 Jul 28;11:921. doi: 10.3389/fphys.2020.00921

FIGURE 6.

FIGURE 6

Representative force–time (upper graph), fiber length–time (middle graph) and sarcomere length–time traces of different isokinetic ramp perturbations (SSC, shortening, stretch) applied to a permeabilized single fiber segment from a rat soleus muscle (n = 1) of the Blebbistatin experiment. The actomyosin inhibitor Blebbistatin (20 μmol l–1) leads to marginal active isometric muscle force levels. Inset: enlarged view of the force response during an active SSC. For reasons of clarity, the passive traces have not been shown in the shaded rectangle or as part of the figure legend.