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Application of Nonlinear Dynamics to Human Knee Movement on Plane and Inclined Treadmill

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New Trends in Medical and Service Robots

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 39))

Abstract

The objective of this study is to quantify and investigate nonlinear motion of the human knee joint for a sample of 7 healthy subjects on plane treadmill and inclined treadmill with an angle of 10° and for both knees of a sample of 3 patients who suffer of osteoarthritis, only on the plane treadmill, using nonlinear dynamics stability analysis. The largest Lyapunov exponent (LLE) and correlation dimensions are calculated as chaotic measures from the experimental time series of the flexion-extension angle of human knee joint. Larger values of LLEs obtained for patients group suffering by osteoarthritis are associated with more divergence and increase of knee variability, while smaller values obtained for healthy subjects reflect increase of local stability, less divergence and variability, less sensitivity to perturbations and higher resistance to stride-to-stride variability. The use of nonlinear tools may provide additional insight on the nature of the step-to-step fluctuations present in human and robotic locomotion.

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Authors and Affiliations

  1. University of Craiova, Craiova, Romania

    D. Tarnita & M. Georgescu

  2. University of Medicine and Pharmacy, Craiova, Romania

    D. N. Tarnita

Authors
  1. D. Tarnita
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  2. M. Georgescu
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  3. D. N. Tarnita
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Corresponding author

Correspondence to D. Tarnita .

Editor information

Editors and Affiliations

  1. Ecole Centrale de Nantes 1, Institut de Recherche en Communications, Nantes Cedex 03, France

    Philippe Wenger

  2. Ecole Centrale de Nantes 1, Inst Rec Comm Cybernetique Nantes, Nantes cedex 3, France

    Christine Chevallereau

  3. Research Center for Industrial Robo, Technical University of Cluj-Napoca, Cluj-Napoca, Romania

    Doina Pisla

  4. IMT - LSRO1, EPFL, Lausanne, Switzerland

    Hannes Bleuler

  5. Robotics Laboratory, Mihajlo Pupin Institute, Belgrade, Serbia

    Aleksandar Rodić

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Tarnita, D., Georgescu, M., Tarnita, D.N. (2016). Application of Nonlinear Dynamics to Human Knee Movement on Plane and Inclined Treadmill. In: Wenger, P., Chevallereau, C., Pisla, D., Bleuler, H., Rodić, A. (eds) New Trends in Medical and Service Robots. Mechanisms and Machine Science, vol 39. Springer, Cham. https://doi.org/10.1007/978-3-319-30674-2_5

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  • DOI: https://doi.org/10.1007/978-3-319-30674-2_5

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-30673-5

  • Online ISBN: 978-3-319-30674-2

  • eBook Packages: EngineeringEngineering (R0)

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