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Correlation between Cognitive and Motor Functions in Parkinson's Disease].
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Brain Nerve 2014 Feb; 66(2):171-4
Authors: Hidetomo Murakami, Mitsuru Kawamura
Abstract Patients with Parkinson's disease (PD) have a number of cognitive impairments even in the early phase of the disease. Anti-dementia drugs such as cholinesterase inhibitors and N-methyl-D-aspartate (NMDA) receptor antagonists are suggested to alleviate such impairments. This supports the simultaneous treatment of both cognitive and motor dysfunctions. Thus, the correlation between these two functions is attracting an increasing clinical interest. Previous studies show a correlation between executive/frontal dysfunction and motor symptoms. This correlation is suggested to be mediated by a dysfunction in the fronto-striatal circuit as a common pathophysiology of executive/frontal and motor dysfunction. Recently, we showed that visuospatial/parietal dysfunction also correlates with motor symptoms, especially postural stability. We argued that the parietal lobe and basal ganglia are functionally connected and that visuospatial dysfunction and postural instability share a common pathophysiology. Anti-dementia drugs such as donepezil and memantine are also suggested to promote relief for postural instability. These drugs may possibly affect the common pathophysiology between both cognitive and motor dysfunctions. Analysis of outcomes using medications which target both cognitive and motor functions may serve as pharmacological tool to determine the pathophysiology of these dysfunctions.
PMID: 24523315 [PubMed - as supplied by publisher]