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Attention and speech-processing related functional brain networks activated in a multi-speaker environment

PloS one, 2019-02, Vol.14 (2), p.e0212754-e0212754 [Peer Reviewed Journal]

COPYRIGHT 2019 Public Library of Science ;COPYRIGHT 2019 Public Library of Science ;2019 Tóth et al 2019 Tóth et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/JOURNAL.PONE.0212754 ;PMID: 30818389

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Title:
Attention and speech-processing related functional brain networks activated in a multi-speaker environment
Author: Tóth, Brigitta ; Farkas, Dávid ; Urbán, Gábor ; Szalárdy, Orsolya ; Orosz, Gábor ; Hunyadi, László ; Hajdu, Botond ; Kovács, Annamária ; Szabó, Beáta Tünde ; Shestopalova, Lidia B ; Winkler, István
Alain, Claude
Subjects: Acoustic Stimulation ; Analysis ; Attention ; Attention (Psychology) ; Attention - physiology ; Auditory Cortex - physiology ; Biology and Life Sciences ; Brain ; Brain research ; Computer and Information Sciences ; Electroencephalography ; Engineering and Technology ; Female ; Frontal Lobe - physiology ; Healthy Volunteers ; Humans ; Male ; Medicine and Health Sciences ; Multitasking Behavior - physiology ; Nerve Net - physiology ; Parietal Lobe - physiology ; Research and Analysis Methods ; Social Sciences ; Speech Perception - physiology ; Young Adult
Is Part Of: PloS one, 2019-02, Vol.14 (2), p.e0212754-e0212754
Description: Human listeners can focus on one speech stream out of several concurrent ones. The present study aimed to assess the whole-brain functional networks underlying a) the process of focusing attention on a single speech stream vs. dividing attention between two streams and 2) speech processing on different time-scales and depth. Two spoken narratives were presented simultaneously while listeners were instructed to a) track and memorize the contents of a speech stream and b) detect the presence of numerals or syntactic violations in the same ("focused attended condition") or in the parallel stream ("divided attended condition"). Speech content tracking was found to be associated with stronger connectivity in lower frequency bands (delta band- 0,5-4 Hz), whereas the detection tasks were linked with networks operating in the faster alpha (8-10 Hz) and beta (13-30 Hz) bands. These results suggest that the oscillation frequencies of the dominant brain networks during speech processing may be related to the duration of the time window within which information is integrated. We also found that focusing attention on a single speaker compared to dividing attention between two concurrent speakers was predominantly associated with connections involving the frontal cortices in the delta (0.5-4 Hz), alpha (8-10 Hz), and beta bands (13-30 Hz), whereas dividing attention between two parallel speech streams was linked with stronger connectivity involving the parietal cortices in the delta and beta frequency bands. Overall, connections strengthened by focused attention may reflect control over information selection, whereas connections strengthened by divided attention may reflect the need for maintaining two streams in parallel and the related control processes necessary for performing the tasks.
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/JOURNAL.PONE.0212754
PMID: 30818389
Source: PLoS (Open access)
Geneva Foundation Free Medical Journals at publisher websites
MEDLINE
PubMed Central
ProQuest Central
DOAJ Directory of Open Access Journals

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Attention and speech-processing related functional brain networks activated in a multi-speaker environment

COPYRIGHT 2019 Public Library of Science ;COPYRIGHT 2019 Public Library of Science ;2019 Tóth et al 2019 Tóth et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/JOURNAL.PONE.0212754 ;PMID: 30818389

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