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. 2009 Apr 1;4(4):e4850. doi: 10.1371/journal.pone.0004850

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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A–E: Length-Tension curve for a single muscle. Blue points: average of the force measured during 200 ms before each step. Red points: estimate of the force at the final elongation after each step using the steady-state value from the spectral fit (see text). Black line: fit based on Eq. 1. F: Fits from panels B–E. The first muscle was excluded because the muscle was “cleaned” too extensively and it slipped around the globe (gray arrow in panel A). Muscles: lateral rectus (LR), superior rectus (SR).