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Benefit of visual speech information for word comprehension in post-stroke aphasia
Journal article   Open access   Peer reviewed

Benefit of visual speech information for word comprehension in post-stroke aphasia

Anna Krason, Gabriella Vigliocco, Marja-Liisa Mailend, Harrison Stoll, Rosemary Varley and Laurel J. Buxbaum
Cortex, v 165, pp 86-100
01 Aug 2023
DOI: https://doi.org/10.1016/j.cortex.2023.04.011
PMID: 37271014
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https://doi.org/10.1016/j.cortex.2023.04.011View
Published, Version of Record (VoR) Open CC BY V4.0

Abstract

Aphasia Audiovisual speech Comprehension Language
Aphasia is a language disorder that often involves speech comprehension impairments affecting communication. In face-to-face settings, speech is accompanied by mouth and facial movements, but little is known about the extent to which they benefit aphasic comprehension. This study investigated the benefit of visual information accompanying speech for word comprehension in people with aphasia (PWA) and the neuroanatomic substrates of any benefit. Thirty-six PWA and 13 neurotypical matched control participants performed a picture-word verification task in which they indicated whether a picture of an animate/inanimate object matched a subsequent word produced by an actress in a video. Stimuli were either audiovisual (with visible mouth and facial movements) or auditory-only (still picture of a silhouette) with audio being clear (unedited) or degraded (6-band noise-vocoding). We found that visual speech information was more beneficial for neurotypical participants than PWA, and more beneficial for both groups when speech was degraded. A multivariate lesion-symptom mapping analysis for the degraded speech condition showed that lesions to superior temporal gyrus, underlying insula, primary and secondary somatosensory cortices, and inferior frontal gyrus were associated with reduced benefit of audiovisual compared to auditory-only speech, suggesting that the integrity of these fronto-temporo-parietal regions may facilitate cross-modal mapping. These findings provide initial insights into our understanding of the impact of audiovisual information on comprehension in aphasia and the brain regions mediating any benefit.

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6 citations in Web of Science
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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Behavioral Sciences
Neurosciences
Psychology, Experimental
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