Abstract
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.
| Original language | English |
|---|---|
| Article number | 257 |
| Number of pages | 9 |
| Journal | Frontiers in Physiology |
| Volume | 10 |
| Issue number | MARCH |
| DOIs | |
| Publication status | Published - 22 Mar 2019 |
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Keywords
- Detrended fluctuation analysis
- Goal-equivalent manifold
- Motor control
- Redundancy
- Variability
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Tightening up the control of treadmill walking : Effects of maneuverability walking: Effects of maneuverability range and acoustic pacing on stride-to-stride fluctuations. / Roerdink, Melvyn; De Jonge, Christa P.; Smid, Lisette M.; Daffertshofer, Andreas.
In: Frontiers in Physiology, Vol. 10, No. MARCH, 257, 22.03.2019.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - Tightening up the control of treadmill walking
T2 - Effects of maneuverability walking: Effects of maneuverability range and acoustic pacing on stride-to-stride fluctuations
AU - Roerdink, Melvyn
AU - De Jonge, Christa P.
AU - Smid, Lisette M.
AU - Daffertshofer, Andreas
PY - 2019/3/22
Y1 - 2019/3/22
N2 - 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.
AB - 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.
KW - Detrended fluctuation analysis
KW - Goal-equivalent manifold
KW - Motor control
KW - Redundancy
KW - Variability
UR - http://www.scopus.com/inward/record.url?scp=85066427495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066427495&partnerID=8YFLogxK
U2 - 10.3389/fphys.2019.00257
DO - 10.3389/fphys.2019.00257
M3 - Article
VL - 10
JO - Frontiers in Physiology
JF - Frontiers in Physiology
SN - 1664-042X
IS - MARCH
M1 - 257
ER -