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White Matter Disease Correlates with Lexical Retrieval Deficits in Primary Progressive AphasiaKeywords: frontotemporal dementia, primary progressive aphasia, diffusion-weighted MRI, magnetic resonance imaging, neuropsychology Abstract: Objective: To relate fractional anisotropy (FA) changes associated with the semantic and logopenic variants of primary progressive aphasia (PPA) to measures of lexical retrieval.
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