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  Neural modelling of the semantic predictability gain under challenging listening conditions

Rysop, A., Schmitt, L., Obleser, J., & Hartwigsen, G. (2021). Neural modelling of the semantic predictability gain under challenging listening conditions. Human Brain Mapping, 42(1), 110-127. doi:10.1002/hbm.25208.

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 Creators:
Rysop, Anna1, Author           
Schmitt, Lea2, 3, Author
Obleser, Jonas2, 3, Author           
Hartwigsen, Gesa1, Author           
Affiliations:
1Lise Meitner Research Group Cognition and Plasticity, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_3025665              
2Department of Psychology, University of Lübeck, Germany, ou_persistent22              
3Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Germany, ou_persistent22              

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Free keywords: Angular gyrus; Cingulo‐opercular network; Predictability gain; Semantic network; Speech‐in‐noise comprehension
 Abstract: When speech intelligibility is reduced, listeners exploit constraints posed by semantic context to facilitate comprehension. The left angular gyrus (AG) has been argued to drive this semantic predictability gain. Taking a network perspective, we ask how the connectivity within language‐specific and domain‐general networks flexibly adapts to the predictability and intelligibility of speech. During continuous functional magnetic resonance imaging (fMRI), participants repeated sentences, which varied in semantic predictability of the final word and in acoustic intelligibility. At the neural level, highly predictable sentences led to stronger activation of left‐hemispheric semantic regions including subregions of the AG (PGa, PGp) and posterior middle temporal gyrus when speech became more intelligible. The behavioural predictability gain of single participants mapped onto the same regions but was complemented by increased activity in frontal and medial regions. Effective connectivity from PGa to PGp increased for more intelligible sentences. In contrast, inhibitory influence from pre‐supplementary motor area to left insula was strongest when predictability and intelligibility of sentences were either lowest or highest. This interactive effect was negatively correlated with the behavioural predictability gain. Together, these results suggest that successful comprehension in noisy listening conditions relies on an interplay of semantic regions and concurrent inhibition of cognitive control regions when semantic cues are available.

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Language(s): eng - English
 Dates: 2020-09-072020-04-042020-09-082020-09-222021-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/hbm.25208
Other: epub 2020
PMID: 32959939
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Project name : -
Grant ID : HA 6314/4‐1
Funding program : -
Funding organization : Deutsche Forschungsgemeinschaft
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Grant ID : OB 352/2‐1
Funding program : -
Funding organization : Deutsche Forschungsgemeinschaft
Project name : -
Grant ID : ERC‐CoG‐2014
Funding program : -
Funding organization : European Research Council
Project name : -
Grant ID : 646696
Funding program : -
Funding organization : European Research Council

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Title: Human Brain Mapping
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 42 (1) Sequence Number: - Start / End Page: 110 - 127 Identifier: ISSN: 1065-9471
CoNE: https://pure.mpg.de/cone/journals/resource/954925601686