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Clinical study reveals cortical plaque counts correlate with language deficits in probable Alzheimer's disease, suggesting language impairment reflects underlying neuropathological severity.
Neuropsychologic and pathologic data are presented for a group of 11 patients with a clinical diagnosis of probable Alzheimer's disease (AD) according to recently proposed criteria. In all cases, the diagnosis was verified by cortical biopsy. In addition, increased cortical plaque counts were associated with greater deficits in language production and comprehension and poorer performance on an index of global mental status. These results suggest that a clinical diagnosis of AD is very accurate when patient selection is restricted to typical cases and that language deficits may provide a useful indicator of severity of disease in AD patients.
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Martín et al. (1987) studied this question.
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