Language impairment in Parkinson's disease

Abstract Increasingly, researchers and clinicians are beginning to unveil both cognitive and linguistic impairments in Parkinson's disease (PD), a condition characterized in the past primarily by impairment of the motoric aspects of ambulation and speech. This study describes subtle language impairment in 20 subjects with PD on a battery of measures selected to be sensitive to frontal lobe language function. Comparative performances of the PD subjects with an age, gender, and education-matched control group revealed significant performance level differences across several language variables. The PD subject group as a whole, presented with impaired naming and definitional abilities, and difficulties in interpreting ambiguity and figurative language. When the PD subjects were divided on the basis of their score on a cognitive rating scale, PD subjects with below normal cognitive status presented with deficits in naming, definition, and multi-definition abilities, as well as problems in interpreting ambiguit...

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