The Kinetics of Cross-Bridge Attachment and Detachment Studied by High Frequency Stiffness Measurements
Muscle fiber stiffness, supposedly an indication of attached cross-bridges, was measured throughout tetanic contraction and subsequent relaxation. Stiffness increased at a rate faster than the development of force during the rise of tetanic contraction and decreased more slowly than force during relaxation. One explanation for these results is that long-lived cross-bridge states may exist between attachment, force generation and detachment.
KeywordsLength Change Stiffness Measurement Tetanic Contraction Length Oscillation Quick Release
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