See the published version of this preprint at Journal of NeuroEngineering and Rehabilitation.
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Hao-Yuan Hsiao
University of Texas at Austin
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8195-9747
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: stroke is a leading cause of disability with associated hemiparesis resulting in difficulty bearing and transferring weight on to the paretic limb. Difficulties in weight bearing and weight transfer may result in impaired mobility and balance, increased fall risk, and decreased community engagement. Despite considerable efforts aimed at improving weight transfer after stroke, impairments in its neuromotor and biomechanical control remain poorly understood. In the present study, a novel experimental paradigm was used to characterize differences in weight transfer biomechanics in individuals with chronic stroke versus able-bodied controls.
Methods: fifteen participants with stroke and fifteen age-matched able-bodied controls participated in the study. Participants stood with one foot on each of two custom built platforms. One of the platforms dropped 4.3 cm vertically to induce lateral weight transfer and weight bearing. Paretic lower extremity joint kinematics, vertical ground reaction forces, and center of pressure velocity were measured. All participants completed the clinical Step Test and Four-Square Step Test.
Results: reduced paretic ankle, knee, and hip joint angular displacement and velocity, delayed ankle and knee inter-joint timing, and altered center of pressure (COP) and center of mass control were exhibited in the stroke group compared to the control group. In addition, paretic COP velocity stabilization time during induced weight transfer predicted Four-Square Step Test scores in individuals post-stroke.
Conclusions: the induced weight transfer approach identified stroke-related abnormalities in the control of weight transfer towards the paretic limb side compared to controls. Decreased joint flexion of the paretic ankle and knee, altered inter-joint timing, and altered COP and center of mass control appear to limit rapid lower limb loading ability. Future work will investigate the potential of improving functional weight transfer through induced weight transfer training exercise.
Keywords
stroke, balance, weight transfer, weight bearing, limb loading, locomotion, perturbation
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Peer Review Timeline
CURRENT STATUS: Published
View the published article at Journal of NeuroEngineering and Rehabilitation.
No community comments so far
Editorial decision: Accept
On 06 Oct, 2020
Review #2 received
Received 25 Sep, 2020
Reviewer #1 agreed
On 25 Sep, 2020
Reviewer #2 agreed
On 25 Sep, 2020
Review #1 received
Received 25 Sep, 2020
Reviewers invited
Invitations sent on 21 Sep, 2020
Editor assigned
On 20 Sep, 2020
Submission checks complete
On 19 Sep, 2020
Editor invited
On 19 Sep, 2020
Version 2
Posted 24 Aug, 2020
No comments provided
Editorial decision: Minor revision
On 10 Sep, 2020
Review #2 received
Received 06 Sep, 2020
Review #1 received
Received 04 Sep, 2020
Reviewer #2 agreed
On 24 Aug, 2020
Reviewer #1 agreed
On 23 Aug, 2020
Editor assigned
On 21 Aug, 2020
Reviewers invited
Invitations sent on 21 Aug, 2020
Submission checks complete
On 20 Aug, 2020
Editor invited
On 20 Aug, 2020
No comments provided
Editorial decision: Major revision
On 03 Jul, 2020
Review #2 received
Received 25 May, 2020
Review #1 received
Received 07 May, 2020
Reviewer #2 agreed
On 04 May, 2020
Reviewer #1 agreed
On 14 Apr, 2020
Reviewers invited
Invitations sent on 11 Apr, 2020
Editor assigned
On 30 Mar, 2020
Submission checks complete
On 29 Mar, 2020
Editor invited
On 29 Mar, 2020
First submitted
On 27 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Physical Medicine & Rehab
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A new preprint design is coming!
We have improved readability, clarity, accessibility, and opportunities for engagement.
See the published version of this preprint at Journal of NeuroEngineering and Rehabilitation.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Hao-Yuan Hsiao
University of Texas at Austin
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8195-9747
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Journal of NeuroEngineering and Rehabilitation.
No community comments so far
Editorial decision: Accept
On 06 Oct, 2020
Review #2 received
Received 25 Sep, 2020
Reviewer #1 agreed
On 25 Sep, 2020
Reviewer #2 agreed
On 25 Sep, 2020
Review #1 received
Received 25 Sep, 2020
Reviewers invited
Invitations sent on 21 Sep, 2020
Editor assigned
On 20 Sep, 2020
Submission checks complete
On 19 Sep, 2020
Editor invited
On 19 Sep, 2020
Version 2
Posted 24 Aug, 2020
No comments provided
Editorial decision: Minor revision
On 10 Sep, 2020
Review #2 received
Received 06 Sep, 2020
Review #1 received
Received 04 Sep, 2020
Reviewer #2 agreed
On 24 Aug, 2020
Reviewer #1 agreed
On 23 Aug, 2020
Editor assigned
On 21 Aug, 2020
Reviewers invited
Invitations sent on 21 Aug, 2020
Submission checks complete
On 20 Aug, 2020
Editor invited
On 20 Aug, 2020
No comments provided
Editorial decision: Major revision
On 03 Jul, 2020
Review #2 received
Received 25 May, 2020
Review #1 received
Received 07 May, 2020
Reviewer #2 agreed
On 04 May, 2020
Reviewer #1 agreed
On 14 Apr, 2020
Reviewers invited
Invitations sent on 11 Apr, 2020
Editor assigned
On 30 Mar, 2020
Submission checks complete
On 29 Mar, 2020
Editor invited
On 29 Mar, 2020
First submitted
On 27 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Physical Medicine & Rehab
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Journal of NeuroEngineering and Rehabilitation.
Background: stroke is a leading cause of disability with associated hemiparesis resulting in difficulty bearing and transferring weight on to the paretic limb. Difficulties in weight bearing and weight transfer may result in impaired mobility and balance, increased fall risk, and decreased community engagement. Despite considerable efforts aimed at improving weight transfer after stroke, impairments in its neuromotor and biomechanical control remain poorly understood. In the present study, a novel experimental paradigm was used to characterize differences in weight transfer biomechanics in individuals with chronic stroke versus able-bodied controls.
Methods: fifteen participants with stroke and fifteen age-matched able-bodied controls participated in the study. Participants stood with one foot on each of two custom built platforms. One of the platforms dropped 4.3 cm vertically to induce lateral weight transfer and weight bearing. Paretic lower extremity joint kinematics, vertical ground reaction forces, and center of pressure velocity were measured. All participants completed the clinical Step Test and Four-Square Step Test.
Results: reduced paretic ankle, knee, and hip joint angular displacement and velocity, delayed ankle and knee inter-joint timing, and altered center of pressure (COP) and center of mass control were exhibited in the stroke group compared to the control group. In addition, paretic COP velocity stabilization time during induced weight transfer predicted Four-Square Step Test scores in individuals post-stroke.
Conclusions: the induced weight transfer approach identified stroke-related abnormalities in the control of weight transfer towards the paretic limb side compared to controls. Decreased joint flexion of the paretic ankle and knee, altered inter-joint timing, and altered COP and center of mass control appear to limit rapid lower limb loading ability. Future work will investigate the potential of improving functional weight transfer through induced weight transfer training exercise.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
This is a list of supplementary files associated with this preprint. Click to download.
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