Spontaneous waves in muscle fibres

Details Spontaneous waves in muscle fibres Spontaneous waves in muscle fibres

2009-01-28

arxiv.org/abs/0901.4517v1

S. Gunther and K. Kruse, Spontaneous waves in muscle fibres. New J. Phys., 9, 417 (2007)

Physics

Biological Physics

14 pages, 9 figures

Scientific paper

10.1088/1367-2630/9/11/417

Mechanical oscillations are important for many cellular processes, e.g. the beating of cilia and flagella or the sensation of sound by hair cells. These dynamic states originate from spontaneous oscillations of molecular motors. A particularly clear example of such oscillations has been observed in muscle fibers under non-physiological conditions. In that case, motor oscillations lead to contraction waves along the fiber. By a macroscopic analysis of muscle fiber dynamics we find that the spontaneous waves involve non-hydrodynamic modes. A simple microscopic model of sarcomere dynamics highlights mechanical aspects of the motor dynamics and fits with the experimental observations.

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