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date: 15 November 2018

Abstract and Keywords

Aphasia is a condition in which previously normal and literate users of a language suffer a disruption in the operation of language processes, including language production, as the result of a focal brain lesion. Aphasic language production, which can differ from normal speech in a variety of different ways, highlights the number and complexity of the elements that constitute normal language. Aphasic speakers may exhibit marked reductions in fluency, may have enormous difficulty producing words to express meaning, may produce fragmented utterances interrupted by numerous pauses, and may produce words that do not express what they intended to say. This article describe the many forms that aphasic language production can take and interprets them within the context of psycholinguistic models of normal language production. First, it discusses language components subject to disruption in aphasia, including fluency, sentence structure, and word retrieval. The article then examines the clinical classification of the aphasias, a model of sentence production, resource limitations in aphasic sentence production (temporal window hypothesis), effects of poor verb retrieval on sentence production, and fluent aphasias.

Keywords: aphasia, language production, psycholinguistic models, fluency, sentence structure, word retrieval, sentence production, resource limitations, temporal window hypothesis, verb retrieval

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