Effect of Stroke on Joint Control during Reach-to-Grasp

A Preliminary Study

Sandesh Raj, Natalia Dounskaia, William W. Clark, Amit Sethi

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
JournalJournal of motor behavior
DOIs
StatePublished - Jan 1 2019

Fingerprint

Torque
Hand Strength
Joints
Stroke
Ataxia
Elbow
Upper Extremity
Muscles

Keywords

  • feedforward control
  • Hemiparesis
  • inter-segmental dynamics
  • interaction torque
  • joint coordination
  • submovements

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

Cite this

Effect of Stroke on Joint Control during Reach-to-Grasp : A Preliminary Study. / Raj, Sandesh; Dounskaia, Natalia; Clark, William W.; Sethi, Amit.

In: Journal of motor behavior, 01.01.2019.

Research output: Contribution to journalArticle

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