Abstract
The terms ‘jargon aphasia’ and ‘jargon agraphia’ describe the production of incomprehensible language containing frequent phonological, semantic or neologistic errors in speech and writing, respectively. Here we describe two patients with primary progressive aphasia (PPA) who produced neologistic jargon either in speech or writing. We suggest that involvement of the posterior superior temporal–inferior parietal region may lead to a disconnection between stored lexical representations and language output pathways leading to aberrant activation of phonemes in neologistic jargon. Parietal lobe involvement is relatively unusual in PPA, perhaps accounting for the comparative rarity of jargon early in the course of these diseases.
Highlights
The production of incomprehensible language containing frequent phonemic distortions, semantic errors or neologisms secondary to neurological disease has been termed jargon aphasia
Three types of jargon aphasia have been described [1,2]: the production of language which is devoid of content and consists of real words that are inappropriate given the context of the situation; the production of language containing inappropriate words that are phonemically-related to what the patient is attempting to convey, and may be either real or non-existent words; and the production of language containing non-existent words or true neologisms, which are not phonemically-related to the target
While neologisms are common in aphasias resulting from acute focal brain damage, neologistic jargon has rarely been reported in neurodegenerative disease [8,9]
Summary
The production of incomprehensible language containing frequent phonemic distortions, semantic errors or neologisms secondary to neurological disease has been termed jargon aphasia (or if writing is affected, jargon agraphia). Jargon aphasia and agraphia can occur in the same individual but they can occur in the presence of normal output in the other language channel [4,7]. They are rarely described in the setting of neurodegenerative disease [8,9].
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