A Novel Three-Filament Model of Force Generation in Eccentric Contraction of Skeletal Muscles
Fig 7
Illustration of active shortening of a sarcomere based on the three filament model.
a, The sarcomere is passively stretched to a length of 2.6μm, activated and b, shortened to 2.4μm. The resulting force is compared to the isometric force at 2.4μm, where the sarcomere is activated at a length of 2.4μm and the elongation of its free spring length is higher, whether titin is attached to actin d or not c.