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• W2891091834 abstract "Postural control is commonly investigated by observing responses to perturbations. We developed a perturbation paradigm mimicking self-generated errors in weight shifting, which are a common cause of falling among older adults. Our aim was to determine the effects of this small, but complex, perturbation on postural sway of healthy young adults and evaluate the role of vision and cognition during movement dependent perturbations. Fifteen participants stood hip-width apart with their eyes open, closed and while performing two different cognitive tasks. Participants were continuously perturbed by medial-lateral (ML) support surface translations corresponding to, and hence doubling, their own center of mass sway. We analyzed the standard deviation (SD), root mean square (RMS), range, and mean power frequency (MPF) of center of pressure displacements. ML postural sway increased due to the perturbation (SD p ≤ .001, range p < .001, RMS p ≤ .001, MPF p < .001). Cognitive load increased the ML sway range (p = .048). Lack of vision increased ML MPF (p = .001) and anterior-posterior (AP) range (p < .001), SD (p < .001), and RMS (p = .001). Significant interaction of vision with the perturbation was found for the ML range (p = .045) and AP SD (p = .018). The perturbation specifically affected ML postural sway. Increased MPF is indicative of a postural control strategy change, which was insufficient for fully controlling the increased sway. Despite being small, this type of perturbation appears to be challenging for young adults." @default.
• W2891091834 created "2018-09-27" @default.
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• W2891091834 date "2019-06-01" @default.
• W2891091834 modified "2023-09-24" @default.
• W2891091834 title "Small, movement dependent perturbations substantially alter postural control strategy in healthy young adults" @default.
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• W2891091834 doi "https://doi.org/10.1016/j.jbiomech.2018.09.008" @default.
• W2891091834 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30262243" @default.
• W2891091834 hasPublicationYear "2019" @default.
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