ArticlePhilosophical transactions. Series A, Mathematical, physical, and engineering sciences2019
Acting together, destabilizing influences can stabilize human balance.
Article in Philosophical transactions. Series A, Mathematical, physical, and engineering sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Effects of sensorimotor delays and muscle force capacity limits on the performance of feedforward and feedback control in animals of different sizes.PLoS computational biology · 2026Article
- Learning to stand with delays alters sensorimotor control but does not cause instability when returning to natural balance.The Journal of physiology · 2025Article
- Pole balancing on the fingertip: model-motivated machine learning forecasting of falls.Frontiers in physiology · 2024Article
- Lifespan changes in postural control.Scientific reports · 2023Article
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- Response to perturbation during quiet standing resembles delayed state feedback optimized for performance and robustness.Scientific reports · 2021Article
- Rolling balance board of adjustable geometry as a tool to assess balancing skill and to estimate reaction time delay.Journal of the Royal Society, Interface · 2021Article
- Nonlinear dynamics of delay systems: an overview.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2019Article
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2 authors.
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Abstract
The causes of falling in the elderly are multi-factorial. Three factors that influence balance stability are the time delay, a sensory dead zone and the maximum ankle torque that can be generated by muscular contraction. Here, the effects of these contributions are evaluated in the context of a model of an inverted pendulum stabilized by time-delayed proportional-derivative (PD) feedback. The effect of the sensory dead zone is to produce a hybrid type of control in which the PD feedback is switched ON or OFF depending on whether or not the controlled variable is larger or smaller than the detection threshold, Π. It is shown that, as Π increases, the region in the plane of control parameters where the balance time (BT) is greater than 60 s is increased slightly. However, when maximum ankle torque is also limited, there is a dramatic increase in the parameter region associated with BTs greater than 60 s. This increase is due to the effects of a torque limitation on over-control associated with bang-bang type switching controllers. These observations show that acting together influences, which are typically thought to destabilize balance, can actually stabilize balance. This article is part of the theme issue 'Nonlinear dynamics of delay systems'.
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