Balance

Human_balance-300

  • On the fractal properties of natural human standing
    “Our analysis
    showed that the COP(center of pressure) displacement during human standing displays fractal properties” 1  
    FullPDF
  • Difference in multifractal spectrum of standing balance in healthy vs. Parkinson patients:
    “We find that COP time series of Parkinson patients exhibit a greater degree of roughness as compared to healthy subjects’ COP traces. Furthermore, MFS for Parkinson patients are narrower, suggesting a reduction in complexity as compared to the healthy group” 2
  • Walking – Fractal variation in the rhythm of step intervals:
    We have found that for healthy adults, fluctuations in the stride interval during walking are not random, but display long-range correlations, extending over thousands of steps, consistent with a fractal gait rhythm and  these correlation properties evolve during childhood and degrade both with physiologic aging and with certain degenerative neurologic
    diseases, including Huntington’s disease and Parkinson’s disease. Furthermore, in subjects with Huntington’s disease, the scaling exponent,  is strongly related to the degree of functional impairment.”  3 FullPDF

–please consider helping this encyclopedia with finishing this article, by summarizing the presented sources–

1.
Duarte M, Zatsiorsky V. On the fractal properties of natural human standing. Neurosci Lett. 2000;283(3):173-176. [PubMed]
2.
Morales C, Kolaczyk E. Wavelet-based multifractal analysis of human balance. Ann Biomed Eng. 2002;30(4):588-597. [PubMed]
3.
Goldberger A, Amaral L, Hausdorff J, Ivanov Pc, Peng C, Stanley H. Fractal dynamics in physiology: alterations with disease and aging. Proc Natl Acad Sci U S A. 2002;99 Suppl 1:2466-2472. [PubMed]

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