Representation of Grammatical Categories of Words in the Brain
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چکیده
H We report the performance of a patient who, as a consequence of left frontal and temporoparietal strokes, makes far more errors on nouns than on verbs in spoken output tasks, but makes far more errors on verbs than on nouns in written input tasks. This double dissociation within a single patient with respect to gmnmatical category provides evidence for the hypothesis that phonological and orthographic representations o f nouns and verbs are processed by independent neural mechanisms. Furthermore, the opposite dissociation in the ver-
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