Lyapunov exponent and surrogation analysis of patterns of variability: profiles in new walkers with and without down syndrome.

@article{Smith2010LyapunovEA,
  title={Lyapunov exponent and surrogation analysis of patterns of variability: profiles in new walkers with and without down syndrome.},
  author={Beth A. Smith and Nick Stergiou and Beverly D. Ulrich},
  journal={Motor control},
  year={2010},
  volume={14 1},
  pages={126-42}
}
In previous studies we found that preadolescents with Down syndrome (DS) produce higher amounts of variability (Smith et al., 2007) and larger Lyapunov exponent (LyE) values (indicating more instability) during walking than their peers with typical development (TD) (Buzzi & Ulrich, 2004). Here we use nonlinear methods to examine the patterns that characterize gait variability as it emerges, in toddlers with TD and with DS, rather than after years of practice. We calculated Lyapunov exponent… CONTINUE READING

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