ISSN: 1899-1955
Human Movement
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SCImago Journal & Country Rank
 
4/2016
vol. 17
 
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abstract:
Original paper

Characteristics of autocorrelation structure of lower extremity functional laterality in disturbed and undisturbed bipedal upright stance

Jacek Stodółka
,
Weronika Stodółka
,
Jarosław Gambal
,
Tom Raunig

Online publish date: 2018/03/12
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Purpose
It is posited that functional laterality is influenced by the generation and conduction of neural signals and therefore associated with sensorimotor control. The question arises if symmetry or asymmetry in sensorimotor processing affects the development of symmetric or asymmetric motor programs in the lower extremities. The purpose of the study was to examine the mechanisms of the human mobility moto-control – the process of maintaining body balance in a standing position through an appropriate course of distribution of ground reaction forces in a time frame, in a situation requiring lower extremity Movement symmetry.

Methods
The autocorrelation function was calculated for ground reaction forces (in the three orthogonal axes) registered during 45 s of bipedal upright stance in two conditions (eyes open and closed).

Results
Minor albeit significant deficiencies in postural muscle control were revealed as a function of time, as evidenced in the decay of the autocorrelation function to zero (T0) between the right and left foot for the mediolateral ground reaction force signal. However, the results attest to symmetrical sensorimotor control between both feet.

Conclusions
Motor actions (postural corrections) performed in long-duration tasks may have less of an effect on sensorimotor control than those applied in shorter duration projections. ANOVA and correlation analysis (across all variables) of the right and left foot T0 indicate considerable symmetry in the control of force magnitude and direction during upright standing.

keywords:

symmetry, asymmetry, foot, force, balance, autocorrelation function

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