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Quantitative analysis of random ameboid motion

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Beta,  Carsten
Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Bodenschatz,  Eberhard
Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Boedeker, H. U., Beta, C., Frank, T. D., & Bodenschatz, E. (2010). Quantitative analysis of random ameboid motion. Europhysics Letters, 90, 28005-1-28005-5. doi:10.1209/0295-5075/90/28005.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-1261-0
Abstract
We quantify random migration of the social ameba Dictyostelium discoideum. We demonstrate that the statistics of cell motion can be described by an underlying Langevin-type stochastic differential equation. An analytic expression for the velocity distribution function is derived. The separation into deterministic and stochastic parts of the movement shows that the cells undergo a damped motion with multiplicative noise. Both contributions to the dynamics display a distinct response to external physiological stimuli. The deterministic component depends on the developmental state and ambient levels of signaling substances, while the stochastic part does not.