Tracking control in the nonparetic hand of subjects with stroke

Archives of Physical Medicine and Rehabilitation
J R CareyR P Di Fabio

Abstract

To examine in subjects with stroke using their nonparetic side how different levels of stimulus-response (S-R) compatibility, which require different levels of information processing, affect manual tracking control. Descriptive study comparing finger movement tracking performance under S-R-compatible and S-R-incompatible conditions between subjects with stroke and healthy controls. Four two-factor analysis of variance tests with one independent factor (group, gender, laterality, or order) and one repeated measures factor (position) comprised the data analysis. University-based research setting. Forty subjects with chronic stroke: 20 right hemiplegia (average age, 65.2+/-2.3 yrs); 20 left hemiplegia (average age, 68.6+/-2.3 yrs). Fifty-one healthy controls: 24 using nondominant hand (average age, 68.6+/-2.1 yrs); 27 using dominant hand (average age, 68.7+/-2.0 yrs). All were right-handed. Tracking accuracy index (AI), based on root-mean-square error normalized to scale of each subject's tracking target. In S-R-incompatible condition, AI of subjects with stroke was not significantly different from controls (F[1, 89]=1.73, p=.19). In S-R-compatible condition, AI of control subjects was significantly better than subjects with strok...Continue Reading

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