Impaired posture, movement preparation, and execution during both paretic and nonparetic reaching following stroke

Journal of Neurophysiology
Chieh-Ling YangSandy McCombe Waller

Abstract

Posture and movement planning, preparation, and execution of a goal-directed reaching movement are impaired in individuals with stroke. No studies have shown whether the deficits are generally impaired or are specific to the lesioned hemisphere/paretic arm. This study utilized StartReact (SR) responses elicited by loud acoustic stimuli (LAS) to investigate the preparation and execution of anticipatory postural adjustments (APAs) and reach movement response during both paretic and nonparetic arm reaching in individuals with stroke and in age-matched healthy controls. Subjects were asked to get ready after receiving a warning cue and to reach at a "go" cue. An LAS was delivered at -500, -200, and 0 ms relative to the go cue. Kinetic, kinematic, and electromyographic data were recorded to characterize APA-reach movement responses. Individuals with stroke demonstrated systemwide deficits in posture and in movement planning, preparation, and execution of APA-reach sequence as shown by significant reduction in the incidence of SR response and impaired APA-reach performance, with greater deficits during paretic arm reaching. Use of trunk compensation strategy as characterized by greater involvement of trunk and pelvic rotation was uti...Continue Reading

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Citations

Jul 29, 2020·Physiotherapy·Cristina Lirio-RomeroBeatriz Sánchez-Sánchez
Apr 3, 2021·Computer Methods in Biomechanics and Biomedical Engineering·Cinzia AmiciJoel Pollet

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