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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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.
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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