Mediolateral footpath stabilization during walking in people following stroke

Community dwelling stroke survivors most often fall while walking. Understanding how post-stroke individuals control mediolateral footpath during walking may help elucidate the mechanisms that contribute to walking instability. By applying the Uncontrolled Manifold (UCM) approach, we investigated (1...

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Bibliographic Details
Published in:PloS one 2018-11, Vol.13 (11), p.e0208120-e0208120
Main Authors: Kao, Pei-Chun, Srivastava, Shraddha
Format: Article
Language:English
Subjects:
Aged
Analysis
Biology and Life Sciences
Biomechanical Phenomena
Central nervous system
Control stability
Exercise equipment
Exercise Test - methods
Exercise Therapy - methods
Female
Fitness equipment
Foot - physiology
Gait
Gait Analysis - methods
Health aspects
Humans
Hypotheses
Kinematics
Male
Medicine and Health Sciences
Middle Aged
Motor ability
Nervous system
Physical Sciences
Physiological aspects
Stability
Stability (Physics)
Stabilization
Stroke - complications
Stroke patients
Stroke Rehabilitation - methods
Studies
Trails
Variables
Variance analysis
Walking
Walking - physiology
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Summary:Community dwelling stroke survivors most often fall while walking. Understanding how post-stroke individuals control mediolateral footpath during walking may help elucidate the mechanisms that contribute to walking instability. By applying the Uncontrolled Manifold (UCM) approach, we investigated (1) how post-stroke individuals coordinate lower-extremity joint motions to stabilize mediolateral footpath of the swing leg, and (2) how the inter-joint coordination in footpath stabilization correlates to their walking stability. Nine stroke subjects and nine healthy controls walked on a treadmill at four different speeds. UCM analysis partitions the variance of kinematic configurations across gait cycles into "good variance" (i.e., the variance component leading to a consistent footpath) or "bad variance" (i.e., the variance component leading to an inconsistent footpath). We found that both groups had a significantly greater "good" than "bad" variance (p
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0208120