To explore motor performance on two different cognitive tasks during robotic rehabilitation in which motor performance was longitudinally assessed.
Patients with chronic stroke and upper extremity impairment (N=22)
A total of 640 repetitions of robot-assisted planar reaching, five times a week for 4 weeks
Main Outcome Measures
Longitudinal 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.
Cognitive 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.
The 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.
Cognitive-motor interference (CMI), Fugl-Meyer assessment (FMA), dual-task effects (DTE), dual-task loss (DTL), Digit span test (DST), Controlled Oral Word Association Test (COWAT), repeated measures (RM), analysis of variance (ANOVA)