Tightening Up the Control of Treadmill Walking: Effects of Maneuverability Range and Acoustic Pacing on Stride-to-Stride Fluctuations
| Autor: | Lisette M. Smid, Andreas Daffertshofer, Christa P. de Jonge, Melvyn Roerdink |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Physiology STRIDE Treadmill walking lcsh:Physiology 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Gait (human) Physiology (medical) motor control medicine Range (statistics) goal-equivalent manifold Original Research Mathematics detrended fluctuation analysis Hardware_MEMORYSTRUCTURES lcsh:QP1-981 variability redundancy musculoskeletal neural and ocular physiology Motor control Pathological gait Uncorrelated 030104 developmental biology Detrended fluctuation analysis human activities 030217 neurology & neurosurgery |
| Zdroj: | Frontiers in Physiology Frontiers in Physiology, Vol 10 (2019) |
| ISSN: | 1664-042X |
| DOI: | 10.3389/fphys.2019.00257 |
| Popis: | The correlational structure of stride-to-stride fluctuations differs between healthy and pathological gait. Uncorrelated and anti-persistent stride-to-stride fluctuations are believed to indicate pathology whereas persistence represents healthy functioning. However, this reading can be questioned because the correlational structure changes with task constraints, like acoustic pacing, signifying the tightness of control over particular gait parameters. We tested this “tightness-of-control interpretation” by varying the maneuverability range during treadmill walking (small, intermediate, and large walking areas), with and without acoustic pacing. Stride-speed fluctuations exhibited anti-persistence, suggesting that stride speeds were tightly controlled, with a stronger degree of anti-persistence for smaller walking areas. Constant-speed goal-equivalent-manifold decompositions revealed simultaneous control of stride times and stride lengths, especially for smaller walking areas to limit stride-speed fluctuations. With acoustic pacing, participants followed both constant-speed and constant-stride-time task goals. This was reflected by a strong degree of anti-persistence around the stride-time by stride-length point that uniquely satisfied both goals. Our results strongly support the notion that anti-persistence in stride-to-stride fluctuations reflect the tightness of control over the associated gait parameter, while not tightly regulated gait parameters exhibit statistical persistence. We extend the existing body of knowledge by showing quantitative changes in anti-persistence of already tightly regulated stride-speed fluctuations. |
| Databáze: | OpenAIRE |
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