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Compensation effect of visual biofeedback in upright posture control.

F Hlavacka, M Saling

    Activitas Nervosa Superior
    |September 1, 1986
    PubMed
    Summary

    Visual biofeedback aids upright posture stability when body weight increases but not on soft surfaces. Effective compensation requires an unchanged efferent-action system for postural control.

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    Area of Science:

    • Biomechanics
    • Human postural control

    Background:

    • Upright posture stability is crucial for daily activities.
    • Visual biofeedback is explored as a tool to enhance postural control.
    • Postural instability can be induced by external factors like increased body weight or unstable surfaces.

    Purpose of the Study:

    • To analyze the effectiveness of visual biofeedback in compensating for decreased upright posture stability.
    • To investigate the influence of visual biofeedback under different destabilizing conditions (soft surface vs. increased body weight).

    Main Methods:

    • Subjects stood on a soft surface and with added body weight to model postural instability.
    • Visual biofeedback was applied during these conditions.
    • The compensatory effect of visual biofeedback on posture stabilization was evaluated.

    Main Results:

    • Visual biofeedback significantly improved upright posture stability when instability was caused by increased body weight.
    • The effect of visual biofeedback was negligible when subjects stood on a soft surface.
    • Effective compensation was observed only when the efferent-action part of the postural system remained functional.

    Conclusions:

    • Visual biofeedback can be an effective compensatory strategy for specific types of postural instability, particularly those related to increased body mass.
    • Its efficacy is limited when postural control is challenged by altered sensory input from the support surface.
    • The integrity of the efferent-action system is critical for successful visual biofeedback-mediated postural compensation.

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