Cognitive Changes in Parkinson’s Disease Patients with Visual HallucinationsRamirez-Ruiz B. · Junque C. · Marti M.-J. · Valldeoriola F. · Tolosa E.
Objective: To evaluate the decline in specific neuropsychological functions in nondemented Parkinson’s disease (PD) patients with a history of visual hallucinations (VH). Methods: Twenty PD patients with VH, 20 PD patients without VH and 18 normal controls were followed up over a 1-year period and assessed for cognitive decline. Results: Forty-five percent of nondemented hallucinating PD patients developed dementia during the 1-year period between baseline and follow-up evaluations. Of the nondemented hallucinating PD patients nearly 70% showed impairment in multiple cognitive domains. The progressive decline in hallucinating PD patients affected mainly visual memory for faces and visuoperceptive-visuospatial functions. Conclusion: Our results support a fast impairment of complex visual functions in hallucinating PD patients, but also a progressive decline in multiple cognitive domains, which have been identified as a risk of developing dementia in PD.
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