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Dual Neural Routing of Visual Facilitation in Speech Processing

The Journal of neuroscience, 2009-10, Vol.29 (43), p.13445-13453 [Peer Reviewed Journal]

Distributed under a Creative Commons Attribution 4.0 International License ;Copyright © 2009 Society for Neuroscience 0270-6474/09/2913445-09$15.00/0 2009 ;ISSN: 0270-6474 ;EISSN: 1529-2401 ;DOI: 10.1523/JNEUROSCI.3194-09.2009 ;PMID: 19864557

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Title:
Dual Neural Routing of Visual Facilitation in Speech Processing
Author: Arnal, Luc H ; Morillon, Benjamin ; Kell, Christian A ; Giraud, Anne-Lise
Subjects: Adult ; Brain - blood supply ; Brain - physiology ; Brain Mapping ; Cerebrovascular Circulation ; Cognitive science ; Feedback, Psychological - physiology ; Female ; Humans ; Magnetic Resonance Imaging ; Magnetoencephalography ; Male ; Middle Aged ; Models, Neurological ; Motion Perception - physiology ; Neural Pathways - physiology ; Neuroscience ; Psychoacoustics ; Speech Perception - physiology ; Time Factors ; Visual Perception - physiology ; Young Adult
Is Part Of: The Journal of neuroscience, 2009-10, Vol.29 (43), p.13445-13453
Description: Viewing our interlocutor facilitates speech perception, unlike for instance when we telephone. Several neural routes and mechanisms could account for this phenomenon. Using magnetoencephalography, we show that when seeing the interlocutor, latencies of auditory responses (M100) are the shorter the more predictable speech is from visual input, whether the auditory signal was congruent or not. Incongruence of auditory and visual input affected auditory responses approximately 20 ms after latency shortening was detected, indicating that initial content-dependent auditory facilitation by vision is followed by a feedback signal that reflects the error between expected and received auditory input (prediction error). We then used functional magnetic resonance imaging and confirmed that distinct routes of visual information to auditory processing underlie these two functional mechanisms. Functional connectivity between visual motion and auditory areas depended on the degree of visual predictability, whereas connectivity between the superior temporal sulcus and both auditory and visual motion areas was driven by audiovisual (AV) incongruence. These results establish two distinct mechanisms by which the brain uses potentially predictive visual information to improve auditory perception. A fast direct corticocortical pathway conveys visual motion parameters to auditory cortex, and a slower and indirect feedback pathway signals the error between visual prediction and auditory input.
Publisher: United States: Soc Neuroscience
Language: English
Identifier: ISSN: 0270-6474
EISSN: 1529-2401
DOI: 10.1523/JNEUROSCI.3194-09.2009
PMID: 19864557
Source: GFMER Free Medical Journals
MEDLINE
PubMed Central
Alma/SFX Local Collection

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Dual Neural Routing of Visual Facilitation in Speech Processing

Distributed under a Creative Commons Attribution 4.0 International License ;Copyright © 2009 Society for Neuroscience 0270-6474/09/2913445-09$15.00/0 2009 ;ISSN: 0270-6474 ;EISSN: 1529-2401 ;DOI: 10.1523/JNEUROSCI.3194-09.2009 ;PMID: 19864557

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