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Open AccessArticle

Post-Effect on the Centre of Feet Pressure during Stance by Continuous Asymmetric Mediolateral Translations of a Supporting Platform—A Preliminary Study in Healthy Young Adults

1
Centro Studi Attività Motorie (CSAM), Istituti Clinici Scientifici Maugeri, IRCCS, 27100 Pavia, Italy
2
Department of Clinical-Surgical, Diagnostic and Paediatric Sciences, University of Pavia, 27100 Pavia, Italy
3
Division of Physical Medicine and Rehabilitation, ICS Maugeri, IRCCS, Institute of Veruno, 28013 Veruno, Italy
4
Istituti Clinici Scientifici Maugeri, IRCCS, 27100 Pavia, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(17), 5969; https://doi.org/10.3390/app10175969
Received: 31 July 2020 / Revised: 22 August 2020 / Accepted: 27 August 2020 / Published: 28 August 2020
(This article belongs to the Special Issue Assistive Technology: Biomechanics in Rehabilitation Engineering)
Various diseases are associated with the impaired control of the medio-lateral (ML) position of the centre of feet pressure (CoP), and several manoeuvres have been proposed for enhancing the CoP symmetry. Here, we assessed in healthy standing subjects the feasibility and outcome of a novel protocol entailing a reaction to a continuous asymmetric ML displacement (10 cm) of the support base. The periodic perturbation consisted of a fast half-cycle (0.5 Hz) followed by a slow half-cycle (0.18 Hz). One hundred successive horizontal translation cycles were delivered in sequence. Eyes were open or closed. CoP was recorded before, after, and during the stimulation by a dynamometric platform fixed onto the translating platform. We found that the post-stimulation CoP was displaced towards the direction of the fast half-cycles. The displacement lasted several tens of seconds. Vision did not affect the amplitude or duration of the post-stimulation effect. The magnitude of post-stimulation CoP displacement was related to the perturbation-induced ML motion of CoP recorded during the stimulation. Over the successive perturbation cycles, the time-course of this motion revealed an adaptation phenomenon. Vision moderately reduced the adaptation rate. The findings support the feasibility of the administration of a simple asymmetric balance perturbation protocol in clinical settings to help patients recover the symmetry of the CoP. This protocol needs to be further validated in older populations and in patients. View Full-Text
Keywords: quiet stance symmetry; asymmetric balance perturbation; periodic translation; frontal plane; postural adaptation quiet stance symmetry; asymmetric balance perturbation; periodic translation; frontal plane; postural adaptation
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MDPI and ACS Style

Sozzi, S.; Nardone, A.; Corna, S.; Schieppati, M. Post-Effect on the Centre of Feet Pressure during Stance by Continuous Asymmetric Mediolateral Translations of a Supporting Platform—A Preliminary Study in Healthy Young Adults. Appl. Sci. 2020, 10, 5969. https://doi.org/10.3390/app10175969

AMA Style

Sozzi S, Nardone A, Corna S, Schieppati M. Post-Effect on the Centre of Feet Pressure during Stance by Continuous Asymmetric Mediolateral Translations of a Supporting Platform—A Preliminary Study in Healthy Young Adults. Applied Sciences. 2020; 10(17):5969. https://doi.org/10.3390/app10175969

Chicago/Turabian Style

Sozzi, Stefania; Nardone, Antonio; Corna, Stefano; Schieppati, Marco. 2020. "Post-Effect on the Centre of Feet Pressure during Stance by Continuous Asymmetric Mediolateral Translations of a Supporting Platform—A Preliminary Study in Healthy Young Adults" Appl. Sci. 10, no. 17: 5969. https://doi.org/10.3390/app10175969

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