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Natural aging and disease processes such as Parkinson's disease often lead to gait impairment. This impairment often manifests as changes in symmetry, complexity, and variability of lower limb joint movements during gait as compared to young healthy adults. Current gait assessment tools primarily focus on discrete events during gait or are based on univariate statistical techniques. Therefore, they...
We examined whether intraindividual variability of neurocognitive speed, or inconsistency, is greater in stages of Parkinson's disease (PD) as compared to a matched group of normal older adults. Intraindividual variability was assessed using four reaction time (RT) (simple and complex) tasks. We examined three sets of correlates: executive functioning (Stroop (interference index), Trail Making Test...
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