Key result
ABRM fibres of Mytilus edulis could bear extremely large loads up to 10-15P(0) for more than 30-60 s during maximum active isometric force generation and the catch state.
Population
Anterior byssal retractor muscle (ABRM) fibres of the bivalve Mytilus edulis
Comparison
Quick increases in load applied during maximum… vs Quick increases in load applied during early…
Design
Preclinical
Authors
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Should not alter cardiovascular practice; leaves open whether dual load-bearing systems operate in mammalian myocardium.
The findings suggest the presence of two independent systems in Mytilus smooth muscle: an actomyosin system for active shortening and a load-bearing system for maintaining the catch state.
Mukou et al. (2004) studied this question. Quick increases in load was evaluated on Mechanical responses of ABRM fibres. ABRM fibres of Mytilus edulis could bear extremely large loads up to 10-15P(0) for more than 30-60 s during maximum active isometric force generation and the catch state.
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