Differential roles of delta and theta oscillations in understanding semantic gist during natural audiovisual speech perception: Functional and anatomical evidence DOI Creative Commons
Hyojin Park, Robin A. A. Ince, Joachim Groß

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2022, Volume and Issue: unknown

Published: June 22, 2022

Abstract Understanding the main topic of naturalistic speech in a multi-speaker environment is demanding though availability visual can be beneficial for comprehension. Recent studies provided evidence that low-frequency brain rhythms play an important role processing acoustic features. However, at present, neural dynamics implementing higher-order semantic system during audiovisual perception unknown. Here we investigated information carried by oscillations delta and theta bands integration high-level gist using representational interaction approach. By manipulating degree content (speech chunks with high versus low probability) Latent Dirichlet Allocation (LDA) modelling algorithm complexity speaker (single multi-speaker), first found phase exert distinctive roles where represents auditory inputs synergistically whereas band does so redundantly. Next, show both forms are observed to greater gist, supported comprehension white matter tractography. Furthermore, phase-specific synergistic right auditory, temporal, inferior frontal areas sensitive environment, activity showing redundant representations content. Our results shed new light on dynamic mechanisms systems through interactions between differential depending environment.

Language: Английский

The use of lexical semantics for processing face-masked speech in monolinguals and bilinguals DOI Open Access
Iyad Ghanim,

Aida Perovic

The Journal of the Acoustical Society of America, Journal Year: 2023, Volume and Issue: 154(2), P. 1202 - 1210

Published: Aug. 1, 2023

Face masks impede visual and acoustic cues that help make speech processing language comprehension more efficient. Many studies report this phenomenon, but few examined how listeners utilize semantic information to overcome the challenges posed by face masks. Fewer still investigated impact on bilinguals' of face-masked [Smiljanic, Keerstock, Meemann, Ransom, S. M. (2021). J. Acoust. Soc. Am. 149(6), 4013-4023; Truong, Beck, Weber 149(1), 142-144]. Therefore, study aims determine monolingual bilingual use compensate for loss when speaker is wearing a mask. A lexical priming experiment tested early-acquiring simultaneous responded video English word pairs. The prime-target pairs were either strongly related, weakly or unrelated both masked unmasked. Analyses reaction time results showed an overall effect masking in groups association strength unmasked speech. However, not different; subsequent analyses difference values no context. These illustrate limited role word-level adverse listening conditions. Results are discussed light at sentence level.

Language: Английский

Citations

0
Get the gist of the story: Neural map of topic keywords in multi-speaker environment DOI Open Access
Hyojin Park, Joachim Groß

Published: Sept. 18, 2023

Neural representation of lexico-semantics in speech processing has been revealed recent years. However, to date, how the brain makes sense higher-level semantic gist (topic keywords) a continuous remains mysterious. Capitalizing on generative probabilistic topic modelling algorithm materials which participants listened while their activities were recorded by Magnetoencephalography (MEG), here we show spatio-temporal neural keywords multi-speaker environment where task-relevant (attended) and -irrelevant (unattended) co-exits. We report difference between salient less both attended unattended speech. Moreover, that greater sensitivity semantically left auditory motor cortices negatively mediates comprehension.

Language: Английский

Citations

0
Get the gist of the story: Neural map of topic keywords in multi-speaker environment DOI Open Access
Hyojin Park, Joachim Groß

Published: Sept. 18, 2023

Neural representation of lexico-semantics in speech processing has been revealed recent years. However, to date, how the brain makes sense higher-level semantic gist (topic keywords) a continuous remains mysterious. Capitalizing on generative probabilistic topic modelling algorithm materials which participants listened while their activities were recorded by Magnetoencephalography (MEG), here we show spatio-temporal neural keywords multi-speaker environment where task-relevant (attended) and -irrelevant (unattended) co-exits. We report difference between salient less both attended unattended speech. Moreover, that greater sensitivity semantically left auditory motor cortices negatively mediates comprehension.

Language: Английский

Citations

0
Differential roles of delta and theta oscillations in understanding semantic gist during natural audiovisual speech perception: Functional and anatomical evidence DOI Creative Commons
Hyojin Park, Robin A. A. Ince, Joachim Groß

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2022, Volume and Issue: unknown

Published: June 22, 2022

Abstract Understanding the main topic of naturalistic speech in a multi-speaker environment is demanding though availability visual can be beneficial for comprehension. Recent studies provided evidence that low-frequency brain rhythms play an important role processing acoustic features. However, at present, neural dynamics implementing higher-order semantic system during audiovisual perception unknown. Here we investigated information carried by oscillations delta and theta bands integration high-level gist using representational interaction approach. By manipulating degree content (speech chunks with high versus low probability) Latent Dirichlet Allocation (LDA) modelling algorithm complexity speaker (single multi-speaker), first found phase exert distinctive roles where represents auditory inputs synergistically whereas band does so redundantly. Next, show both forms are observed to greater gist, supported comprehension white matter tractography. Furthermore, phase-specific synergistic right auditory, temporal, inferior frontal areas sensitive environment, activity showing redundant representations content. Our results shed new light on dynamic mechanisms systems through interactions between differential depending environment.

Language: Английский

Citations

0