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. 2016 Oct 4;7:443. doi: 10.3389/fphys.2016.00443

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Copyright © 2016 Gollapudi and Chandra.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relationship between changes in the steady-state force responses and the imposed muscle length changes. Five individual mouse fiber bundles (α-MHC) were subjected to various amplitude stretch/release perturbations (ΔL; ±0.1%, ±0.2%, ±0.3%, ±0.4%, ±0.5%, ±1.0%, ±1.5%, and ±2.0% of ML) and the corresponding steady-state force responses (ΔT) were recorded. The trace connecting the data (squares) represents the linear regression fit for the averaged ΔT-ΔL relationship from five muscle fiber bundles. The r² value of the linear regression fit was 0.998, clearly indicating that the force scaled linearly with ML. Data are presented as mean ± SE. Standard error bars are smaller than symbols.