Studying mechanisms underlying stroke induced movement disorders using 3-D robotics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

When chronic hemiparetic stroke survivors make reaching movements while lifting the paretic arm against gravity, their ability to generate the necessary independent joint movements for reaching degrades dramatically due to abnormal muscle coactivation patterns that couple shoulder abduction with elbow flexion. The neural mechanisms behind the appearance of abnormal coordination patterns during post-stroke recovery are largely unknown, but they are possibly related to a loss in cortical resolution and an increased usage of undamaged, indirect descending motor pathways via the brainstem. In order to investigate the underlying mechanisms responsible for this behavior in chronic stroke survivors, we combine 3-D robotics with the mapping of brain activity during controlled reaching movements with different levels of robot-mediated limb support. Our results provide evidence for changes in cortical activity driving realistic upper-extremity reaching movements as shoulder abduction drive is increased and independent joint control becomes compromised in stroke survivors. The advantage of using robotics to study mechanisms underlying the loss of independent joint control is discussed.

Original languageEnglish (US)
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationNeuroengineering, Neural Systems, Rehabilitation and Prosthetics
Pages395-397
Number of pages3
Volume25
Edition9
DOIs
StatePublished - Dec 1 2009
EventWorld Congress on Medical Physics and Biomedical Engineering: Neuroengineering, Neural Systems, Rehabilitation and Prosthetics - Munich, Germany
Duration: Sep 7 2009Sep 12 2009

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering: Neuroengineering, Neural Systems, Rehabilitation and Prosthetics
CountryGermany
CityMunich
Period9/7/099/12/09

Keywords

  • Brain imaging
  • Coordination
  • Rehabilitation robotics
  • Stroke
  • Upper limb

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

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