Fig. 3.

Lattice spacing changes of muscle 178 and 179 under steady-state isometric conditions. Passive and active d₁₀ of muscles 178 (A) and 179 (B) at strains of −10% to +10% of operating length (OL), with 95% confidence interval (CI) of the mean. (C) Strain conditions used, with the timing of activation indicated by the star at t=0. (D) Total average change under activation in d₁₀ across all strains with 95% confidence of the mean, showing a difference in the mean of 0.92 nm (P<10^–3). Sample sizes, n, at strains (−10,−5,0,5,10) were (7,6,8,7,7) for muscle 178 and (8,9,8,9,9) for muscle 179.