Dynamic Stability of Gait Cycles as a Function of Speed and System Constraints

in Motor Control
Restricted access

Purchase article

USD $24.95

Student 1 year subscription

USD $76.00

1 year subscription

USD $101.00

Student 2 year subscription

USD $144.00

2 year subscription

USD $188.00

The purpose of this study was to examine the dynamic stability of two groups of children with different dynamic resources in changing contexts. The stability of the lower extremity segments of preadolescent children (8–10 years old) with and without Down syndrome (DS) was evaluated as children walked on a motorized treadmill at varying speeds. Tools from nonlinear dynamics, maximum Lyapunov exponent, and approximate entropy were used to assess the behavioral stability of segmental angular displacements of the thigh, shank, and foot. Our results suggest that children with DS show decreased dynamic stability during walking in all segments and that this might be a consequence of inherently different subsystem constraints between these groups. Differences between groups also varied, though not uniformly, with speed, suggesting that inherent differences could further constrain the behavioral response to changing task demands.

The authors are with the Division of Kinesiology at the University of Michigan, Ann Arbor, MI 48109-2214.

Motor Control
Article Metrics
All Time Past Year Past 30 Days
Abstract Views 24 24 10
Full Text Views 3 3 3
PDF Downloads 4 4 4
Altmetric Badge
PubMed
Google Scholar
Cited By