The head leads the body: a curvature-based kinematic description of C. elegans

Details The head leads the body: a curvature-based kinematic description of C. elegans The head leads the body: a curvature-based kinematic description of C. elegans

2012-02-13

arxiv.org/abs/1202.2832v1

Physics

Biological Physics

Scientific paper

Caenorhabditis elegans, a free-living soil nematode, propels itself by producing undulatory body motion and displays a rich variety of body shapes and trajectories during its locomotion in complex environments. Here we show that the complex shapes and trajectories of C. elegans have a simple analytical description in curvature representation. Our model is based on the assumption that the curvature wave is generated in the head segment of the worm body and propagates backwards. We have found that a simple harmonic function for the curvature can capture multiple worm shapes during the undulatory movement. The worm body trajectories can be well represented in terms of piecewise sinusoidal curvature with abrupt changes in amplitude, wavevector, and phase.

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