Key result
Following electrical stimulation of skeletal muscle fibers, myosin heads move approximately 10 nm away from the filament midpoint, with a time course matching force generation.
Population
Intact skeletal muscle cells
Comparison
Electrical stimulation vs Resting muscle
Design
Preclinical
Authors
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Provides structural evidence on myosin attachment limiting force rise; hypothesis-generating for contractile disorders, pending human validation.
This study demonstrates that the rate of force development in skeletal muscle is limited by the attachment of myosin heads to actin, providing structural insights into muscle contraction.
Reconditi et al. (2011) studied Skeletal muscle contraction (n=5). Electrical stimulation vs. Resting state was evaluated on Axial motion of myosin heads. Following electrical stimulation of skeletal muscle fibers, myosin heads move approximately 10 nm away from the filament midpoint, with a time course matching force generation.
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