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2016, Number 2

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Rev Mex Ing Biomed 2016; 37 (2)

Interpretación de variabilidad en la postura bípeda quieta en edad sensible al sistema de control

Maureira PH, Jarur MC

Language: Spanish
References: 38
Page: 123-134
PDF size: 729.28 Kb.


ABSTRACT

The human postural control study through statistical mechanic techniques identifies dynamic behavior withcharacteristics of persistence and anti-persistence. Such behaviors are interpreted like time-dependent variability ofthe control systems, and indicators that reflect these ones, are diffusion coefficient and scaling exponent obtainedwith stabilogram diffusion analysis (SDA) technique.
A force platform was used to obtain stabilometry records and SDA was applied in order to discriminate thetemporal behavior of the variability in quasi-static bipedal position in a group of 22 students in critical age (11,2±1,5 years old) for postural control maturity, between eyes-closed and eyes-open conditions.
The results of diffusion coefficients (Ds,D1) and scaling exponents (Hs,H1) in both visual condition have twodistinct phases from ADE graphic and establish statistically significant differences forDsandHs, when comparingthe displacement of COP between open eyes and closed eyes.
The SDA allows us to identify a behavior of postural control system similar to adults, modeled like a two-phasefractional Brownian motion.


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