Temperature dependence of the equatorial reflections. (A) Intensity of the 1,0 equatorial reflection both at rest (open circles) and at the plateau of the isometric tetanus (black circles), normalized (norm.) for the value at rest at 30°C. (B) Intensity ratio of the 1,1 and 1,0 reflections, at rest (open circles) and at the plateau of the isometric tetanus (black circles); mean ± SEM, n = 12; six muscles.