Neural modelling of the semantic predictability gain under challenging listening conditions

Autor: Rysop, Anna Uta, Schmitt, Lea‐Maria, Obleser, Jonas, Hartwigsen, Gesa
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Adult
Male
Computer science
Speech recognition
Middle temporal gyrus
speech‐in‐noise comprehension
semantic network
Intelligibility (communication)
Semantic network
050105 experimental psychology
Angular gyrus
03 medical and health sciences
Young Adult
0302 clinical medicine
medicine
Connectome
Humans
Speech
Radiology
Nuclear Medicine and imaging
0501 psychology and cognitive sciences
Active listening
Predictability
predictability gain
Research Articles
Cerebral Cortex
Psycholinguistics
Radiological and Ultrasound Technology
medicine.diagnostic_test
05 social sciences
Speech Intelligibility
Dynamic causal modelling
Cognition
16. Peace & justice
Magnetic Resonance Imaging
Semantics
Comprehension
cingulo‐opercular network
Neurology
angular gyrus
Speech Perception
Female
Neurology (clinical)
Anatomy
Nerve Net
Functional magnetic resonance imaging
030217 neurology & neurosurgery
Research Article
Zdroj: Human Brain Mapping
ISSN: 1097-0193
1065-9471
Popis: 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. The facilitatory influence of PGp on PGa (quantified by dynamic causal modelling) 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 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.
Databáze: OpenAIRE
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