Task directionality impacts the ability of individuals with chronic hemiparetic stroke to match torques between arms: Preliminary findings

Nina A. Van Der Helm, Netta Gurari, Justin M. Drogos, Julius P.A. Dewald

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

Post hemiparetic stroke an individual may face difficulty performing bimanual tasks due to an asymmetry in their arms' strengths. Here, we determined whether participants with a strength asymmetry were impaired bi-directionally when matching torques between arms (i.e., paretic arm matches non-paretic arm, non-paretic arm matches paretic arm). Six participants with chronic hemiparetic stroke and four participants without neurological impairments partook in this study. First, we identified the maximum voluntary torque that participants could generate about each elbow joint (τmvt). Then, we determined how accurately and precisely participants could match, bidirectionally, submaximal isometric flexion torques (0.25 · τMVT:Reference) between arms. Results demonstrate that task directionality impacted the ability of our participants with stroke who had a strength asymmetry to match torques between arms; specifically, participants were unimpaired matching to a referenced non-paretic arm yet impaired in the opposite direction. Additionally, results reveal that the degree to which participants overshot the target torque when matching with their non-paretic arm could be predicted based on their strength asymmetry (R2 Adjusted = 0.67). We propose that individuals with stroke may avoid torque matching impairments during bimanual tasks by matching their paretic arm to their non-paretic arm.

Original languageEnglish
Title of host publicationProceedings 2017 International Conference on Rehabilitation Robotics (ICORR 2017)
Place of PublicationPiscataway, NJ, USA
PublisherIEEE
Pages714-719
ISBN (Electronic)9781538622964
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event2017 IEEE 15th International Conference on Rehabilitation Robotics (ICORR 2017) - London, United Kingdom
Duration: 17 Jul 201720 Jul 2017
Conference number: 15

Conference

Conference2017 IEEE 15th International Conference on Rehabilitation Robotics (ICORR 2017)
Abbreviated titleICORR 2017
CountryUnited Kingdom
CityLondon
Period17/07/1720/07/17

Keywords

  • Torque
  • Elbow
  • Testing
  • Visualization
  • Atmospheric measurements
  • Particle measurements
  • Monitoring

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