Angular distribution of fractal temporal correlations supports adaptive responses to wobble board instability DOI
Brian Schlattmann, Ken Kiyono, Damian G. Kelty‐Stephen

et al.

Journal of The Royal Society Interface, Journal Year: 2025, Volume and Issue: 22(223)

Published: Feb. 1, 2025

Contemporary dynamical models of human postural control propose an intermittent controller regulating the centre pressure (CoP) about a stable saddle-shaped manifold along anatomical anteroposterior (AP) and mediolateral (ML) axes, releasing CoP in outwards spiral when inactive. Experimental manipulations can evoke this saddle-type topology fractal temporal correlations AP axis reducing ML axis. However, true effects task demands may often manifest within angular space between axes—a not typically modelled explicitly. We tested how instability attentional load influence across full range variability two-dimensional (2D) support surface. Forty-eight healthy young adults performed suprapostural Trail Making Test (TMT) while standing on wobble board, inducing continuous perturbations Stable, quiet exhibited classic saddle-like topology, with stronger displacements axes. The demand TMT did affect variation or strength 2Dsupport maintaining upright balance board reshaped reoriented distribution correlations, accentuating rotating strongest predominantly Stabilizing posture face prompted correlations. These findings challenge traditional dependence theories exclusively external force-plate axes underscore significance multifractality defining parameters that govern stability 2D

Language: Английский

Angular distribution of fractal temporal correlations supports adaptive responses to wobble board instability DOI
Brian Schlattmann, Ken Kiyono, Damian G. Kelty‐Stephen

et al.

Journal of The Royal Society Interface, Journal Year: 2025, Volume and Issue: 22(223)

Published: Feb. 1, 2025

Contemporary dynamical models of human postural control propose an intermittent controller regulating the centre pressure (CoP) about a stable saddle-shaped manifold along anatomical anteroposterior (AP) and mediolateral (ML) axes, releasing CoP in outwards spiral when inactive. Experimental manipulations can evoke this saddle-type topology fractal temporal correlations AP axis reducing ML axis. However, true effects task demands may often manifest within angular space between axes—a not typically modelled explicitly. We tested how instability attentional load influence across full range variability two-dimensional (2D) support surface. Forty-eight healthy young adults performed suprapostural Trail Making Test (TMT) while standing on wobble board, inducing continuous perturbations Stable, quiet exhibited classic saddle-like topology, with stronger displacements axes. The demand TMT did affect variation or strength 2Dsupport maintaining upright balance board reshaped reoriented distribution correlations, accentuating rotating strongest predominantly Stabilizing posture face prompted correlations. These findings challenge traditional dependence theories exclusively external force-plate axes underscore significance multifractality defining parameters that govern stability 2D

Language: Английский

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