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Increasing Visual Biofeedback Scale Changes Postural Control Complexity

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Abstract

Visual biofeedback (vFB) during quiet stance has been shown to improve postural control. While this improvement has been quantified by a reduction in the center of pressure (COP) sway, the effect on COP complexity remains unexplored. As such, 20 young adults (12 females; aged 23.63 ± 3.17 years) were asked to remain in a static upright posture under different visual biofeedback magnitude (no feedback [NoFB], magnified by 1 [vFB1], magnified by 5 [vBF5] and magnified by 10 [vBF10]). In addition to confirming, through traditional COP variables (i.e. standard deviation, mean velocity, sway area), that vFB scaling improved postural control, results also suggested changes in COP complexity. Specifically, sample entropy and wavelet analysis showed that increasing the vFB scale from 1:1 to 1:5 and 1:10 led to a more irregular COP and a shift toward higher frequency. Together, and particularly from a complexity standpoint, these findings provided additional understandings of how vFB and vFB scaling improved postural control.

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Data will be provided upon request.

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Funding

The author LM received funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) through the NSERC Postgraduate Scholarships – Doctoral (PGS D).

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L M: Conceptualization, Methodology, Data curation, Formal Analysis, Investigation, Project Administration, Software, Supervision, Validation, Visualization, Writing – Original Draft, Writing – Review & Editing. F F: Investigation, Writing – Original Draft, Writing – Review & Editing. Y L: Conceptualization, Methodology, Project Administration, Resources, Supervision, Validation, Visualization, Writing – Original Draft, Writing – Review & Editing.

Corresponding author

Correspondence to Yves Lajoie.

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Ethics Approval

Approval was obtained from the ethics committee of the University of Ottawa C. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.

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Informed consent was obtained from all individual participants included in the study.

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Patients signed informed consent regarding publishing their data.

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The authors declare that they have no conflict of interest.

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Michaud, L., Laniel, F. & Lajoie, Y. Increasing Visual Biofeedback Scale Changes Postural Control Complexity. Appl Psychophysiol Biofeedback 49, 291–299 (2024). https://doi.org/10.1007/s10484-023-09619-w

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  • DOI: https://doi.org/10.1007/s10484-023-09619-w

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