ArticleCerebral cortex (New York, N.Y. : 1991)2020
Taxonomic Interference Associated with Phonemic Paraphasias in Agrammatic Primary Progressive Aphasia.
Article in Cerebral cortex (New York, N.Y. : 1991), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 5 citations in OpenAlex.
- Article
- Unveiling Cognitive Interference: fNIRS Insights Into Poststroke Aphasia During Stroop Tasks.Neural plasticity · 2025Article
- The eyes speak when the mouth cannot: Using eye movements to interpret omissions in primary progressive aphasia.Neuropsychologia · 2023Article
- Eye movements as a measure of word comprehension deficits in primary progressive aphasia.Brain and language · 2022Article
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10 authors at 3 institutions in 1 country.
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Abstract
Phonemic paraphasias are thought to reflect phonological (post-semantic) deficits in language production. Here we present evidence that phonemic paraphasias in non-semantic primary progressive aphasia (PPA) may be associated with taxonomic interference. Agrammatic and logopenic PPA patients and control participants performed a word-to-picture visual search task where they matched a stimulus noun to 1 of 16 object pictures as their eye movements were recorded. Participants were subsequently asked to name the same items. We measured taxonomic interference (ratio of time spent viewing related vs. unrelated foils) during the search task for each item. Target items that elicited a phonemic paraphasia during object naming elicited increased taxonomic interference during the search task in agrammatic but not logopenic PPA patients. These results could reflect either very subtle sub-clinical semantic distortions of word representations or partial degradation of specific phonological word forms in agrammatic PPA during both word-to-picture matching (input stage) and picture naming (output stage). The mechanism for phonemic paraphasias in logopenic patients seems to be different and to be operative at the pre-articulatory stage of phonological retrieval. Glucose metabolic imaging suggests that degeneration in the left posterior frontal lobe and left temporo-parietal junction, respectively, might underlie these different patterns of phonemic paraphasia.
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