Introduction: A capacity to perform two tasks at the same time is a prerequisite for an individual to have a normal life. Under normal circumstances, performing motor and cognitive tasks concomitantly is common. Objective: The aim of this study was investigate the motor-cognitive dual task performance in Parkinson's disease patients. Method: Two groups were studied. One group was composed by 10 healthy individuals and the other by 10 patients with a diagnosis of Parkinson's disease. In both groups, the ages were between 47 and 75 years and the individuals were paired in relation to gender and age. They were asked to put on a button-up shirt as fast as possible as a single task and also while saying girls' names in random order (dual task). Each task was repeated three times. The movement time and errors committed were analyzed. Results: The patients took more time to complete both tasks (p= 0.006) in relation to the healthy group. Both groups committed more errors in the dual task (p= 0.03). There was a reduction in the movement time with the repetition of the task (p= 0.039) for both groups. Conclusion: These results suggest that individuals with Parkinson's disease present a loss in motor performance in relation to healthy individuals. However, the cost of performing the task is independent of motor-cognitive interference and the possibility of performance's improvement with practice is real.
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