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Related Experiment Videos

An application of mathematical models in posturography

L Kodde, H B Caberg, J M Mol

    Journal of Biomedical Engineering
    |January 1, 1982
    PubMed
    Summary

    This study reveals that mathematical models of human balance do not accurately represent measured statokinesigrams. Correcting stabilograms with these models significantly reduces the calculated line-integral, impacting balance analysis.

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    Area of Science:

    • Biomechanics
    • Human postural control
    • Physiological measurement

    Background:

    • Horizontal displacements (HD) of the human body's center of mass during quiet standing are measured using force platforms.
    • These measurements generate stabilograms (time-series data in left-right and anterior-posterior directions).
    • Stabilograms are used to create statokinesigrams, which visually represent postural sway.

    Purpose of the Study:

    • To compare measured statokinesigrams with those generated by mathematical models of standing humans.
    • To evaluate the impact of mathematical modeling on the analysis of postural sway data.

    Main Methods:

    • Acquiring horizontal displacement data using a platform during quiet standing.
    • Generating measured statokinesigrams by eliminating time from left-right and anterior-posterior stabilograms.
    • Developing and applying mathematical models to simulate standing posture and generate model-based statokinesigrams.
    • Calculating the line-integral from both measured and model-derived statokinesigrams.

    Main Results:

    • Statokinesigrams derived from mathematical models significantly differ from measured statokinesigrams.
    • The line-integral calculated from model-corrected statokinesigrams is substantially smaller than that from measured statokinesigrams.

    Conclusions:

    • Current mathematical models do not accurately replicate the dynamics of human postural sway as captured by stabilograms.
    • The use of mathematical models for correcting or interpreting statokinesigram data may lead to inaccurate quantitative assessments of balance.

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