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Geriatric Research, Education, and Clinical Center. (Drs. Mortimer, Pirozzolo, Hansch. and Webster) Veterans Administration Medical Center, and Department of Neurology, University of Minnesota Medical School, (Drs. Pirozzolo and Webster) Minneapolis, MN.
We studied 60 patients with idiopathic Parkinson disease with motor and neuropsychologic tests to ascertain whether the severity of motor symptoms was associated with the degree of neuropsychologic deficit. Significant correlations were found between the severity of bradykinesia and impaired performance on tests assessing visual-spatial reasoning and psychomotor speed. More severe tremor was associated with better performance on a spatial orientation memory test. These relationships remained when age, age at onset, and self-rated depression were controlled. The findings suggested that cognitive impairment may result from the same subcortical lesions that cause motor symptoms.
Address correspondence and reprint requests to Dr. Mortimer, GRECC (127F), VA Medical Center. Minneapolis. MN 55417.
Presented at the thirty-third annual meeting of the American Academy of Neurology, Toronto, Ontario, April 1981.
Accepted for publication August 4, 1981.
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