The underlying cause of cognitive deficits in PD (PD-MCI) is not well understood and there are no biomarkers to diagnose PD-MCI. Although previous studies have found disrupted functional connectivity several factors make it difficult to generalize findings from fMRI studies. In the current study, we investigate functional network abnormalities in PD-MCI and PD patients who are cognitively normal (PD-NC). Our results were in line with earlier studies that showed altered connectivity was observed involving the frontal and striatal regions in the PD-MCI group, and we also found altered connectivity between regions in the temporal and the parietal cortex.
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