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Article Dans Une Revue Physical Review Letters Année : 2019

Functionality of Disorder in Muscle Mechanics

Résumé

A salient feature of skeletal muscles is their ability to take up an applied slack in a microsecond timescale. Behind this fast adaptation is a collective folding in a bundle of elastically interacting bistable elements. Since this interaction has a long-range character, the behavior of the system in force and length controlled ensembles is different; in particular, it can have two distinct order-disorder–type critical points. We show that the account of the disregistry between myosin and actin filaments places the elementary force-producing units of skeletal muscles close to both such critical points. The ensuing “double criticality” contributes to the system’s ability to perform robustly and suggests that the disregistry is functional.
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hal-02416800 , version 1 (16-09-2024)

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Hudson Borja da Rocha, Lev Truskinovsky. Functionality of Disorder in Muscle Mechanics. Physical Review Letters, 2019, 122 (8), pp.088103. ⟨10.1103/PhysRevLett.122.088103⟩. ⟨hal-02416800⟩
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