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Effect of Stroke on Joint Control during Reach-to-Grasp: A Preliminary Study.

  • Academic Journal
  • Raj S; Department of Occupational Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
    Dounskaia N; Kinesiology Program, Arizona State University, Phoenix, Arizona, USA.
    Clark WW; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
    Sethi A; Department of Occupational Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
  • Journal of motor behavior [J Mot Behav] 2020; Vol. 52 (3), pp. 294-310. Date of Electronic Publication: 2019 May 20.
  • English
  • We investigated changes in control of inter-segmental dynamics underlying upper extremity dyscoordination caused by stroke. Individuals with stroke and healthy individuals performed a natural reach-to-grasp movement. Kinetic analysis revealed that both groups rotated the shoulder by muscle torque and used interaction torque to rotate the elbow. However, individuals with stroke used interaction torque less than healthy individuals, actively suppressing a substantial portion of it. This resulted in inefficient use of active control and dyscoordination of the upper extremity. The degree of interaction torque suppression and inefficiency of active control at the elbow positively correlated with stroke severity. The increased interaction torque suppression can be a strategy used by individuals with stroke to compensate for deficient feedforward control of this torque.
Additional Information
Publisher: Routledge Country of Publication: United States NLM ID: 0236512 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1940-1027 (Electronic) Linking ISSN: 00222895 NLM ISO Abbreviation: J Mot Behav Subsets: MEDLINE
Publication: 2010- : New York : Routledge
Original Publication: College Park, Md., Journal Pub. Affiliates.
Keywords: Hemiparesis*; feedforward control*; inter-segmental dynamics*; interaction torque*; joint coordination*; submovements*
Date Created: 20190521 Date Completed: 20210511 Latest Revision: 20210511

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