Intonation Units in Spontaneous Speech Evoke a Neural Response.
delta-band speech tracking
electroencephalography
general linear model
intonation units
speech prosody
spontaneous speech processing
Journal
The Journal of neuroscience : the official journal of the Society for Neuroscience
ISSN: 1529-2401
Titre abrégé: J Neurosci
Pays: United States
ID NLM: 8102140
Informations de publication
Date de publication:
29 Nov 2023
29 Nov 2023
Historique:
received:
08
02
2023
revised:
16
08
2023
accepted:
29
08
2023
pmc-release:
29
05
2024
medline:
1
12
2023
pubmed:
5
10
2023
entrez:
4
10
2023
Statut:
epublish
Résumé
Spontaneous speech is produced in chunks called intonation units (IUs). IUs are defined by a set of prosodic cues and presumably occur in all human languages. Recent work has shown that across different grammatical and sociocultural conditions IUs form rhythms of ∼1 unit per second. Linguistic theory suggests that IUs pace the flow of information in the discourse. As a result, IUs provide a promising and hitherto unexplored theoretical framework for studying the neural mechanisms of communication. In this article, we identify a neural response unique to the boundary defined by the IU. We measured the EEG of human participants (of either sex), who listened to different speakers recounting an emotional life event. We analyzed the speech stimuli linguistically and modeled the EEG response at word offset using a GLM approach. We find that the EEG response to IU-final words differs from the response to IU-nonfinal words even when equating acoustic boundary strength. Finally, we relate our findings to the body of research on rhythmic brain mechanisms in speech processing. We study the unique contribution of IUs and acoustic boundary strength in predicting delta-band EEG. This analysis suggests that IU-related neural activity, which is tightly linked to the classic Closure Positive Shift (CPS), could be a time-locked component that captures the previously characterized delta-band neural speech tracking.
Identifiants
pubmed: 37793909
pii: JNEUROSCI.0235-23.2023
doi: 10.1523/JNEUROSCI.0235-23.2023
pmc: PMC10697392
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8189-8200Informations de copyright
Copyright © 2023 the authors.
Déclaration de conflit d'intérêts
The authors declare no competing financial interests.
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