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Estimation of Temporal Gait Events from a Single Accelerometer Through the Scale-Space Filtering Idea

  • Mobile & Wireless Health
  • Published:
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Abstract

The purpose of this paper is to develop an accelerometry system capable of performing gait event demarcation and calculation of temporal parameters using a single waist-mounted device. Particularly, a mobile phone positioned over the L2 vertebra is used to acquire trunk accelerations during walking. Signals from the acceleration magnitude and the vertical acceleration are smoothed through different filters. Cut-off points between filtered signals as a result of convolving with varying levels of Gaussian filters and other robust features against temporal variation and noise are used to identify peaks that correspond to gait events. Five pre-frail older adults and five young healthy adults were recruited in an experiment. Cadence, step/stride time, step/stride CV, step asymmetry and percentages of the stance/swing and single/double support phases, among the two groups of different mobility were quantified by the system.

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Notes

  1. Finite Impulse Response.

  2. Continuous Wavelet Transform.

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Acknowledgments

This work is supported by the FRASE MINECO project (TIN2013-47152-C3-1-R) and also by the Plan Propio de Investigación program from Castilla-La Mancha University.

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Authors and Affiliations

  1. University of Castilla-La Mancha, Esc. Sup. de Informática, Paseo de la Universidad 4, 13071, Ciudad Real, Spain

    Iván González, Jesús Fontecha, Ramón Hervás & José Bravo

Authors
  1. Iván González
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  2. Jesús Fontecha
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  3. Ramón Hervás
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  4. José Bravo
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Correspondence to Iván González.

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This article is part of the Topical Collection on Mobile & Wireless Health.

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González, I., Fontecha, J., Hervás, R. et al. Estimation of Temporal Gait Events from a Single Accelerometer Through the Scale-Space Filtering Idea. J Med Syst 40, 251 (2016). https://doi.org/10.1007/s10916-016-0612-4

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  • DOI: https://doi.org/10.1007/s10916-016-0612-4

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