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BackgroundFor People with Parkinson's (PwP), motor disturbances affecting the dominant upper extremity often impacts ability to perform tasks such as writing or typing and may confound cognitive test performances with graphomotor responding.ObjectivesWe explored association between upper extremity impairment and graphomotor cognitive test performances in a clinical sample of moderately advanced PwP pursuing Deep Brain Stimulation (DBS).MethodsA retrospective chart review was conducted of 80 consecutive right hand dominant PwP who completed pre-DBS neuropsychological evaluations. Right upper extremity (RUE) impairment was measured using MDS-UPDRS Part 3. Non-parametric correlations examined associations between RUE impairment and tests involving graphomotor (trail making, letter cancellation, visual memory) versus oral responding (fluency, digit span, verbal memory).ResultsNo statistically significant associations were observed between RUE motor impairment and graphomotor test performances.ConclusionsMinimal impact of dominant RUE impairment on graphomotor tasks in moderately advanced PwP supports application in clinical and research settings.
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