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Anomia is an impairment of word retrieval that manifests in myriad ways. It is generally considered to be ubiquitous in persons with aphasia (PWA) secondary to stroke and is frequently observed in persons with traumatic brain injury. Anomia is a cardinal sign of the logopenic and semantic variants of primary progressive aphasia and of semantic dementia. After a discussion of two stages of word production, this entry describes types of word production errors and outlines clinical considerations for the rehabilitation of aphasia.

Anomia may arise from at least two of the stages (processes in some nomenclatures) of word production that translate a concept to an acoustic spectrum that conveys a speaker’s thought to a listener’s ear. Figure 1 displays a model of lexical access that includes ...

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