Cognitive motor interference on upper extremity motor performance in a robot-assisted planar reaching task among patients with stroke

Publication date: Available online 31 December 2016
Source:Archives of Physical Medicine and Rehabilitation
Author(s): Joon-Ho Shin, Gyulee Park, Duk Youn Cho
ObjectiveTo explore motor performance on two different cognitive tasks during robotic rehabilitation in which motor performance was longitudinally assessed.DesignProspective studySettingRehabilitation hospitalParticipantsPatients with chronic stroke and upper extremity impairment (N=22)InterventionA total of 640 repetitions of robot-assisted planar reaching, five times a week for 4 weeksMain Outcome MeasuresLongitudinal robotic evaluations regarding motor performance included smoothness, mean velocity, path error, and reach error by the type of cognitive task. Dual-task effects (DTE) of motor performance were computed in order to analyze the effect of the cognitive task on dual-task interference.ResultsCognitive task type influenced smoothness (p = 0.006), the DTE of smoothness (p = 0.002), and the DTE of reach error (p = 0.052). Robotic rehabilitation improved smoothness (p = 0.007) and reach error (p = 0.078), while stroke severity affected smoothness (p = 0.01), reach error (p < 0.001), and path error (p = 0.01). Robotic rehabilitation or severity did not affect the DTE of motor performance.ConclusionsThe present results provide evidence for the effect of cognitive-motor interference on upper extremity performance among participants with stroke using a robotic-guided rehabilitation system.



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