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?

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 non-dominant), and the direction of oscillation was anterior-posterior and medial-lateral. 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 non-dominant 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 Lehr's damping ratio depends on lateral dominance and the direction of perturbation; however, it is independent of body mass and body height.

Original languageEnglish
Title of host publicationEnvironmental Health and Biomedicine
Pages373-382
Number of pages10
DOIs
Publication statusPublished - Dec 1 2011
Event6th Int. Conf. on the Impact of Environmental Factors on Health, and 9th Int. Conf. on Modelling in Medicine and Biology - Environmental Health Risk 2011, EHR 2011 - Riga, Latvia
Duration: Jul 25 2011Jul 27 2011

Publication series

NameWIT Transactions on Biomedicine and Health
Volume15
ISSN (Print)1743-3525

Other

Other6th Int. Conf. on the Impact of Environmental Factors on Health, and 9th Int. Conf. on Modelling in Medicine and Biology - Environmental Health Risk 2011, EHR 2011
CountryLatvia
CityRiga
Period7/25/117/27/11

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Keywords

  • Balance
  • Sudden perturbation
  • Ultrasound-based measuring

ASJC Scopus subject areas

  • Modelling and Simulation
  • Biomedical Engineering
  • Computer Science Applications
  • Public Health, Environmental and Occupational Health

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