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Nonlinear fractal dynamics of human colonic pressure activity based upon the box-counting method

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  • Rongguo Yan
  • Xudong Guo

Abstract

The computational fractal dimension of human colonic pressure activity acquired by a telemetric capsule robot under normal physiological conditions was studied using the box-counting method. The fractal dimension is a numeric value that quantifies to measure how rough the signal is from nonlinear dynamics, rather than its amplitude or other linear statistical features. The colonic pressure activities from the healthy subject during three typical periods were analysed. The results showed that the activity might be fractal with a non-integer fractal dimension after it being integrated over time using the cumsum method, which was never revealed before. Moreover, the activity (after it being integrated) acquired soon after wakening up was the roughest (also the most complex one) with the largest fractal dimension, closely followed by that acquired during sleep with that acquired long time after awakening up (in the daytime) ranking third with the smallest fractal dimension. Fractal estimation might provide a new method to learn the nonlinear dynamics of human gastrointestinal pressure recordings.

Suggested Citation

  • Rongguo Yan & Xudong Guo, 2013. "Nonlinear fractal dynamics of human colonic pressure activity based upon the box-counting method," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 16(6), pages 660-668, June.
    • Handle: RePEc:taf:gcmbxx:v:16:y:2013:i:6:p:660-668
    DOI: 10.1080/10255842.2011.631527
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    References listed on IDEAS

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    1. Gavriel Iddan & Gavriel Meron & Arkady Glukhovsky & Paul Swain, 2000. "Wireless capsule endoscopy," Nature, Nature, vol. 405(6785), pages 417-417, May.
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