Ability of individuals with chronic hemiparetic stroke to locate their forearms during singlearm and between-Arms tasks

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Abstract

According to between-Arms assessments, more than 50% of individuals with stroke have an impaired position sense. Our previous work, which employed a clinical assessment and slightly differing tasks, indicates that individuals who have a deficit on a between-forearms position-localization task do not necessarily have a deficit on a single-forearm position-localization task. Objective Our goal here was to, using robotics tools, determine whether individuals with stroke who have a deficit when matching forearm positions within an arm also have a deficit when mirroring forearm positions between arms, independent of the arm that leads the task. Methods Eighteen participants with chronic hemiparetic stroke and nine controls completed a singlearm position-matching experiment and between-Arms position-mirroring experiment. For each experiment, the reference forearm (left/right) passively rotated about the elbow joint to a reference target location (flexion/extension), and then the participant actively rotated their same/opposite forearm to match/mirror the reference forearm's position. Participants with stroke were classified as having a position-matching/-mirroring deficit based on a quantitative threshold that was derived from the controls' data. Results On our single-Arm task, one participant with stroke was classified as having a positionmatching deficit with a mean magnitude of error greater than 10.7° when referencing their paretic arm. Position-matching ability did not significantly differ for the controls and the remaining seventeen participants with stroke. On our between-Arms task, sevenparticipants with stroke were classified as having a position-mirroring deficit with a mean magnitude of error greater than 10.1°. Position-mirroring accuracy was worse for these participants with stroke, when referencing their paretic arm, than the controls. Concluding remark Findings underscore the need for assessing within-Arm position-matching deficits, in addition to between-Arms position-mirroring deficits when referencing each arm, to comprehensively evaluate an individual's ability to locate their forearm(s).

Original languageEnglish (US)
Article numbere0206518
JournalPloS one
Volume13
Issue number10
DOIs
StatePublished - Oct 1 2018

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Aptitude
stroke
Forearm
Arm
Stroke
Experiments
Mirrors
Robotics
elbows
joints (animal)
Proprioception
Elbow Joint

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

@article{3f04a21903544855ba35ff04e11389cb,
title = "Ability of individuals with chronic hemiparetic stroke to locate their forearms during singlearm and between-Arms tasks",
abstract = "According to between-Arms assessments, more than 50{\%} of individuals with stroke have an impaired position sense. Our previous work, which employed a clinical assessment and slightly differing tasks, indicates that individuals who have a deficit on a between-forearms position-localization task do not necessarily have a deficit on a single-forearm position-localization task. Objective Our goal here was to, using robotics tools, determine whether individuals with stroke who have a deficit when matching forearm positions within an arm also have a deficit when mirroring forearm positions between arms, independent of the arm that leads the task. Methods Eighteen participants with chronic hemiparetic stroke and nine controls completed a singlearm position-matching experiment and between-Arms position-mirroring experiment. For each experiment, the reference forearm (left/right) passively rotated about the elbow joint to a reference target location (flexion/extension), and then the participant actively rotated their same/opposite forearm to match/mirror the reference forearm's position. Participants with stroke were classified as having a position-matching/-mirroring deficit based on a quantitative threshold that was derived from the controls' data. Results On our single-Arm task, one participant with stroke was classified as having a positionmatching deficit with a mean magnitude of error greater than 10.7° when referencing their paretic arm. Position-matching ability did not significantly differ for the controls and the remaining seventeen participants with stroke. On our between-Arms task, sevenparticipants with stroke were classified as having a position-mirroring deficit with a mean magnitude of error greater than 10.1°. Position-mirroring accuracy was worse for these participants with stroke, when referencing their paretic arm, than the controls. Concluding remark Findings underscore the need for assessing within-Arm position-matching deficits, in addition to between-Arms position-mirroring deficits when referencing each arm, to comprehensively evaluate an individual's ability to locate their forearm(s).",
author = "Netta Gurari and Justin Drogos and Dewald, {Julius P A}",
year = "2018",
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AU - Dewald, Julius P A

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N2 - According to between-Arms assessments, more than 50% of individuals with stroke have an impaired position sense. Our previous work, which employed a clinical assessment and slightly differing tasks, indicates that individuals who have a deficit on a between-forearms position-localization task do not necessarily have a deficit on a single-forearm position-localization task. Objective Our goal here was to, using robotics tools, determine whether individuals with stroke who have a deficit when matching forearm positions within an arm also have a deficit when mirroring forearm positions between arms, independent of the arm that leads the task. Methods Eighteen participants with chronic hemiparetic stroke and nine controls completed a singlearm position-matching experiment and between-Arms position-mirroring experiment. For each experiment, the reference forearm (left/right) passively rotated about the elbow joint to a reference target location (flexion/extension), and then the participant actively rotated their same/opposite forearm to match/mirror the reference forearm's position. Participants with stroke were classified as having a position-matching/-mirroring deficit based on a quantitative threshold that was derived from the controls' data. Results On our single-Arm task, one participant with stroke was classified as having a positionmatching deficit with a mean magnitude of error greater than 10.7° when referencing their paretic arm. Position-matching ability did not significantly differ for the controls and the remaining seventeen participants with stroke. On our between-Arms task, sevenparticipants with stroke were classified as having a position-mirroring deficit with a mean magnitude of error greater than 10.1°. Position-mirroring accuracy was worse for these participants with stroke, when referencing their paretic arm, than the controls. Concluding remark Findings underscore the need for assessing within-Arm position-matching deficits, in addition to between-Arms position-mirroring deficits when referencing each arm, to comprehensively evaluate an individual's ability to locate their forearm(s).

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