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This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort.

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Presentation on theme: "This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort."— Presentation transcript:

1 This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation. J Rehabil Res Dev. 2013;50(1):85–98. http://dx.doi.org/10.1682/JRRD.2011.04.0068 Slideshow Project DOI:10.1682/JRRD.2011.04.0068JSP Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation Nathaniel Makowski; Jayme Knutson, PhD; John Chae, MD; Patrick Crago, PhD

2 This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation. J Rehabil Res Dev. 2013;50(1):85–98. http://dx.doi.org/10.1682/JRRD.2011.04.0068 Slideshow Project DOI:10.1682/JRRD.2011.04.0068JSP Aim – Determine whether: Force produced by voluntary effort and functional electrical stimulation (FES) add together independently of effort, or Increment in force depends on level of voluntary effort. Relevance – FES may augment functional arm and hand movement poststroke. – Poststroke neuroprostheses incorporating voluntary effort and FES must consider how forces combine in order to provide appropriate level of stimulation.

3 This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation. J Rehabil Res Dev. 2013;50(1):85–98. http://dx.doi.org/10.1682/JRRD.2011.04.0068 Slideshow Project DOI:10.1682/JRRD.2011.04.0068JSP Method Participants performed isometric force matching tasks under different combinations of voluntary effort and FES. Participants reached steady level of force. – While they attempted to maintain constant effort level, FES was applied to augment force.

4 This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation. J Rehabil Res Dev. 2013;50(1):85–98. http://dx.doi.org/10.1682/JRRD.2011.04.0068 Slideshow Project DOI:10.1682/JRRD.2011.04.0068JSP Results Increment in force produced by FES decreases as level of initial voluntary effort increases.

5 This article and any supplementary material should be cited as follows: Makowski P, Knutson J, Chae J, Crago P. Interaction of poststroke voluntary effort and functional neuromuscular electrical stimulation. J Rehabil Res Dev. 2013;50(1):85–98. http://dx.doi.org/10.1682/JRRD.2011.04.0068 Slideshow Project DOI:10.1682/JRRD.2011.04.0068JSP Conclusion Potential mechanisms causing change in force output are proposed, but relative contribution of each mechanism is unknown.

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