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This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and.

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Presentation on theme: "This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and."— Presentation transcript:

1 This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke. J Rehabil Res Dev. 2013;50(4):555-72. http://dx.doi.org/10.1682/JRRD.2011.10.0206 Slideshow Project DOI:10.1682/JRRD.2011.10.0206JSP Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke Anindo Roy, PhD; Larry W. Forrester, PhD; Richard F. Macko, MD; Hermano I. Krebs, PhD

2 This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke. J Rehabil Res Dev. 2013;50(4):555-72. http://dx.doi.org/10.1682/JRRD.2011.10.0206 Slideshow Project DOI:10.1682/JRRD.2011.10.0206JSP Aim – Investigate robot-assisted ankle training in people with chronic stroke: Effect on passive ankle stiffness (PAS). Relationship to overground gait function. Relevance – Mechanical impedance of ankle is known to influence key aspects of ankle function.

3 This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke. J Rehabil Res Dev. 2013;50(4):555-72. http://dx.doi.org/10.1682/JRRD.2011.10.0206 Slideshow Project DOI:10.1682/JRRD.2011.10.0206JSP Method 8 seated participants with residual hemiparetic deficits engaged in visuomotor task over 6 wk: – Performed dorsiflexion (DF) or plantar flexion (PF) of paretic ankle. – Ankle robot (“anklebot”) assisted as needed. PAS was measured in both: – Trained sagittal plane. – Untrained frontal plane.

4 This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke. J Rehabil Res Dev. 2013;50(4):555-72. http://dx.doi.org/10.1682/JRRD.2011.10.0206 Slideshow Project DOI:10.1682/JRRD.2011.10.0206JSP Results PAS decreased in both DF and PF. DF PAS: – Reverted into variability of age-matched controls. PF PAS: – Changes correlated strongly with gains in paretic step length and stride length. – Baseline correlated with gains in paretic step length, stride length, and single-support stance duration. Baseline eversion PAS: – Correlated with gains in cadence.

5 This article and any supplementary material should be cited as follows: Roy A, Forrester LW, Macko RF, Krebs HI. Changes in passive ankle stiffness and its effects on gait function in people with chronic stroke. J Rehabil Res Dev. 2013;50(4):555-72. http://dx.doi.org/10.1682/JRRD.2011.10.0206 Slideshow Project DOI:10.1682/JRRD.2011.10.0206JSP Conclusion Ankle robot-assisted, visually evoked, visually guided ankle training positively affects paretic ankle PAS. – Strongly influences key measures of gait function.

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