Naming difficulties in alexia with agraphia for kanji after a left posterior inferior temporal lesion.

Abstract

The case is described of a patient with alexia and agraphia for kanji, and severe anomia after a subcortical haemorrhage in the left posterior inferior temporal area. Magnetic resonance imaging at four months after onset showed a lesion in the inferior temporal and fusiform gyri, extending from the temporo-occipital junction toward the anterior third of the temporal lobe. Comparison with other reported cases of alexia with agraphia and anomia made it clear that when accompanied by severe anomia, the lesions extended either forward to the anterior part of the middle temporal gyrus or medially to the parahippocampal gyrus. It is suggested that the disconnection of association fibres between the parahippocampal, fusiform, middle, and inferior temporal gyri, especially between the parahippocampal gyrus and the other temporal gyri, or the cortical damage to the posterior part of these gyri is essential for the production of anomia.

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