Abstract
Background: Variability in joint kinematics is necessary for adaptability and response to everyday perturbations; however, intrinsic neuromotor changes secondary to stroke often cause abnormal movement patterns. How these abnormal movement patterns relate to joint kinematic variability and its influence on post-stroke walking impairments is not well understood. Objective: The purpose of this study was to evaluate the movement variability at the individual joint level in the paretic and non-paretic limbs of individuals post-stroke. Methods: Seven individuals with hemiparesis post-stroke walked on a treadmill for two minutes at their self-selected speed and the average speed of the six-minute walk test while kinematics were recorded using motion-capture. Variability in hip, knee, and ankle flexion/extension angles during walking were quantified with the Lyapunov exponent (LyE). Interlimb differences were evaluated. Results: The paretic side LyE was higher than the non-paretic side at both self-selected speed (Hip: 50%; Knee: 74%), and the average speed of the 6-min walk test (Hip: 15%; Knee: 93%). Conclusion: Differences in joint kinematic variability between limbs of persons post-stroke supports further study of the source of non-paretic limb deviations as well as the clinical implications of joint kinematic variability in persons post-stroke. The development of bilaterally-targeted post-stroke gait interventions to address variability in both limbs may promote improved outcomes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Journal of Biomechanics |
| Volume | 68 |
| DOIs | |
| State | Published - Feb 8 2018 |
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Keywords
- Gait
- Nonlinear analysis
- Stroke
- Variability
ASJC Scopus subject areas
- Biophysics
- Orthopedics and Sports Medicine
- Biomedical Engineering
- Rehabilitation
Cite this
Dynamic structure of lower limb joint angles during walking post-stroke. / Kempski, Kelley; Awad, Louis N.; Buchanan, Thomas S.; Higginson, Jill S.; Knarr, Brian A.
In: Journal of Biomechanics, Vol. 68, 08.02.2018, p. 1-5.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dynamic structure of lower limb joint angles during walking post-stroke
AU - Kempski, Kelley
AU - Awad, Louis N.
AU - Buchanan, Thomas S.
AU - Higginson, Jill S.
AU - Knarr, Brian A.
PY - 2018/2/8
Y1 - 2018/2/8
N2 - Background: Variability in joint kinematics is necessary for adaptability and response to everyday perturbations; however, intrinsic neuromotor changes secondary to stroke often cause abnormal movement patterns. How these abnormal movement patterns relate to joint kinematic variability and its influence on post-stroke walking impairments is not well understood. Objective: The purpose of this study was to evaluate the movement variability at the individual joint level in the paretic and non-paretic limbs of individuals post-stroke. Methods: Seven individuals with hemiparesis post-stroke walked on a treadmill for two minutes at their self-selected speed and the average speed of the six-minute walk test while kinematics were recorded using motion-capture. Variability in hip, knee, and ankle flexion/extension angles during walking were quantified with the Lyapunov exponent (LyE). Interlimb differences were evaluated. Results: The paretic side LyE was higher than the non-paretic side at both self-selected speed (Hip: 50%; Knee: 74%), and the average speed of the 6-min walk test (Hip: 15%; Knee: 93%). Conclusion: Differences in joint kinematic variability between limbs of persons post-stroke supports further study of the source of non-paretic limb deviations as well as the clinical implications of joint kinematic variability in persons post-stroke. The development of bilaterally-targeted post-stroke gait interventions to address variability in both limbs may promote improved outcomes.
AB - Background: Variability in joint kinematics is necessary for adaptability and response to everyday perturbations; however, intrinsic neuromotor changes secondary to stroke often cause abnormal movement patterns. How these abnormal movement patterns relate to joint kinematic variability and its influence on post-stroke walking impairments is not well understood. Objective: The purpose of this study was to evaluate the movement variability at the individual joint level in the paretic and non-paretic limbs of individuals post-stroke. Methods: Seven individuals with hemiparesis post-stroke walked on a treadmill for two minutes at their self-selected speed and the average speed of the six-minute walk test while kinematics were recorded using motion-capture. Variability in hip, knee, and ankle flexion/extension angles during walking were quantified with the Lyapunov exponent (LyE). Interlimb differences were evaluated. Results: The paretic side LyE was higher than the non-paretic side at both self-selected speed (Hip: 50%; Knee: 74%), and the average speed of the 6-min walk test (Hip: 15%; Knee: 93%). Conclusion: Differences in joint kinematic variability between limbs of persons post-stroke supports further study of the source of non-paretic limb deviations as well as the clinical implications of joint kinematic variability in persons post-stroke. The development of bilaterally-targeted post-stroke gait interventions to address variability in both limbs may promote improved outcomes.
KW - Gait
KW - Nonlinear analysis
KW - Stroke
KW - Variability
UR - http://www.scopus.com/inward/record.url?scp=85044843308&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044843308&partnerID=8YFLogxK
U2 - 10.1016/j.jbiomech.2017.12.019
DO - 10.1016/j.jbiomech.2017.12.019
M3 - Article
C2 - 29325901
AN - SCOPUS:85044843308
VL - 68
SP - 1
EP - 5
JO - Journal of Biomechanics
JF - Journal of Biomechanics
SN - 0021-9290
ER -