Dementia in Parkinson disease: A neuropsychological analysis

Francis J. Pirozzolo, Edward C. Hansch, James A. Mortimer, David D. Webster, Michael A Kuskowski

Research output: Contribution to journalArticlepeer-review

240 Scopus citations


An extensive set of neuropsychological measures was administered to 60 Parkinson's disease patients and age-, sex-, and education-matched controls in order to investigate the nature and prevalence of the cognitive deficit in the disease. Parkinsonian patients performed significantly poorer on all measures with the exception of tests for apraxia and object recognition, and on a test of vocabulary knowledge. Discriminant analysis of the test data revealed that over 93% of patients are impaired relative to matched controls, but that assigning a prevalence rate for dementia in the disease may be difficult due to the continuous distribution of cognitive deficits.

Original languageEnglish (US)
Pages (from-to)71-83
Number of pages13
JournalBrain and Cognition
Issue number1
StatePublished - Jan 1982


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