Do Lateral Dominance, Body Mass, Body Height
And Direction Of Perturbation Influence The
Lehr’s Damping Ratio, Which Characterizes The
Balancing Ability On An Unstable Oscillatory
Platform?
Author(s)
R. M. Kiss
Abstract
An unstable oscillatory platform can be used as a simple measuring instrument
for modelling balancing capacity. We sought to determine the effects of
(1) lateral dominance, (2) body mass, (3) body height and (4) the direction of
perturbation on the Lehr’s damping ratio for characterizing the balancing ability
of 80 healthy young participants on an unstable oscillatory platform. Tests were
performed while standing on both limbs and on one limb (dominant or nondominant),
and the direction of oscillation was anterior-posterior and mediallateral.
The healthy patients were divided into four groups based on body height
and into five groups based on body mass. The average value of the Lehr’s
damping ratio was significantly smaller for participants standing on their nondominant
limb compared to their standing on both limbs or on the dominant
limb. The largest difference of the Lehr’s damping ratio was 0.014 (2.5%)
comparing the groups with different body mass, and it was 0.012 (2.1%)
comparing the groups with different body height. A weak correlation was found
between the Lehr’s damping ratio and body mass (r=0.14) and between the
Lehr’s damping ratio and body height (r=0.19). There was a significant
difference when comparing the Lehr’s damping ratio determined from oscillation
in the anterior-posterior direction to the Lehr’s damping ratio determined from
oscillation in the medial-lateral direction (p<0.008). Based in our results the
Keywords
ultrasound-based measuring, sudden perturbation, balance
Related Book
Other papers in this volume
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