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  Brain regions recruited for the effortful comprehension of noise-vocoded words

Hervais-Adelman, A., Carlyon, R. P., Johnsrude, I. S., & Davis, M. H. (2012). Brain regions recruited for the effortful comprehension of noise-vocoded words. Language and Cognitive Processes, 27(7-8), 1145-1166. doi:10.1080/01690965.2012.662280.

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Hervais-Adelman, Alexis1, 2, Author           
Carlyon, Robert P.2, Author
Johnsrude, Ingrid S.3, Author
Davis, Matthew H.2, Author
Affiliations:
1Functional Brain Mapping Laboratory, Department of Fundamental Neuroscience , University of Geneva Medical School , Geneva , Switzerland, ou_persistent22              
2MRC Cognition and Brain Sciences Unit , Cambridge , UK, ou_persistent22              
3Department of Psychology , Queen's University , Kingston , Ontario , Canada, ou_persistent22              

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 Abstract: We used functional magnetic resonance imaging (fMRI) to investigate the neural basis of comprehension and perceptual learning of artificially degraded [noise vocoded (NV)] speech. Fifteen participants were scanned while listening to 6-channel vocoded words, which are difficult for naive listeners to comprehend, but can be readily learned with appropriate feedback presentations. During three test blocks, we compared responses to potentially intelligible NV words, incomprehensible distorted words and clear speech. Training sessions were interleaved with the test sessions and included paired presentation of clear then noise-vocoded words: a type of feedback that enhances perceptual learning. Listeners' comprehension of NV words improved significantly as a consequence of training. Listening to NV compared to clear speech activated left insula, and prefrontal and motor cortices. These areas, which are implicated in speech production, may play an active role in supporting the comprehension of degraded speech. Elevated activation in the precentral gyrus during paired clear-then-distorted presentations that enhance learning further suggests a role for articulatory representations of speech in perceptual learning of degraded speech.

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Language(s): eng - English
 Dates: 2012
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: Other: WOS:000306551100009
DOI: 10.1080/01690965.2012.662280
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Title: Language and Cognitive Processes
Source Genre: Journal
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Publ. Info: Utrecht, Netherlands : VNU Science Press
Pages: - Volume / Issue: 27 (7-8) Sequence Number: - Start / End Page: 1145 - 1166 Identifier: ISSN: 0169-0965
CoNE: https://pure.mpg.de/cone/journals/resource/954925267270