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. 2013 Jun 14;110(24):248103.
doi: 10.1103/PhysRevLett.110.248103. Epub 2013 Jun 11.

Muscle as a metamaterial operating near a critical point

M Caruel  1 , J-M Allain  2 , L Truskinovsky  2
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Muscle as a metamaterial operating near a critical point

M Caruel et al. Phys Rev Lett. .

Abstract

The passive mechanical response of skeletal muscles at fast time scales is dominated by long range interactions inducing cooperative behavior without breaking the detailed balance. This leads to such unusual "material properties" as negative equilibrium stiffness and different behavior in force and displacement controlled loading conditions. Our fitting of experimental data suggests that "muscle material" is finely tuned to perform close to a critical point which explains large fluctuations observed in muscles close to the stall force.

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