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Impairments on lexical and semantic fluency tasks occur in both cortical and subcortical dementia. Recent reports that the average size of phonemic and semantic clusters is reduced in Alzheimer's disease (AD), but not in Parkinson's disease (PD) could support the hypothesis that in AD verbal fluency deficits arise from degraded memory storage while in PD the same impairments result from defective...
Several tests of visuospatial cognition are known to be sensitive to chronic alcohol abuse, but the consequences of combined abuse of alcohol and other drugs on these measures is not known. To address this issue, groups that had abused only alcohol, alcohol and marijuana, or alcohol and multiple other drugs (Alc/Poly) were compared to community controls. Testing occurred after at least 3 weeks of...
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