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Visual speech differentially modulates beta, theta, and high gamma bands in auditory cortex
dc.contributor.authorKarthik, G.
dc.contributor.authorPlass, John
dc.contributor.authorBeltz, Adriene M.
dc.contributor.authorLiu, Zhongming
dc.contributor.authorGrabowecky, Marcia
dc.contributor.authorSuzuki, Satoru
dc.contributor.authorStacey, William C.
dc.contributor.authorWasade, Vibhangini S.
dc.contributor.authorTowle, Vernon L.
dc.contributor.authorTao, James X.
dc.contributor.authorWu, Shasha
dc.contributor.authorIssa, Naoum P.
dc.contributor.authorBrang, David
dc.date.accessioned2021-12-02T02:27:50Z
dc.date.available2022-12-01 21:27:46en
dc.date.available2021-12-02T02:27:50Z
dc.date.issued2021-11
dc.identifier.citationKarthik, G.; Plass, John; Beltz, Adriene M.; Liu, Zhongming; Grabowecky, Marcia; Suzuki, Satoru; Stacey, William C.; Wasade, Vibhangini S.; Towle, Vernon L.; Tao, James X.; Wu, Shasha; Issa, Naoum P.; Brang, David (2021). "Visual speech differentially modulates beta, theta, and high gamma bands in auditory cortex." European Journal of Neuroscience 54(9): 7301-7317.
dc.identifier.issn0953-816X
dc.identifier.issn1460-9568
dc.identifier.urihttps://hdl.handle.net/2027.42/170934
dc.description.abstractSpeech perception is a central component of social communication. Although principally an auditory process, accurate speech perception in everyday settings is supported by meaningful information extracted from visual cues. Visual speech modulates activity in cortical areas subserving auditory speech perception including the superior temporal gyrus (STG). However, it is unknown whether visual modulation of auditory processing is a unitary phenomenon or, rather, consists of multiple functionally distinct processes. To explore this question, we examined neural responses to audiovisual speech measured from intracranially implanted electrodes in 21 patients with epilepsy. We found that visual speech modulated auditory processes in the STG in multiple ways, eliciting temporally and spatially distinct patterns of activity that differed across frequency bands. In the theta band, visual speech suppressed the auditory response from before auditory speech onset to after auditory speech onset (−93 to 500 ms) most strongly in the posterior STG. In the beta band, suppression was seen in the anterior STG from −311 to −195 ms before auditory speech onset and in the middle STG from −195 to 235 ms after speech onset. In high gamma, visual speech enhanced the auditory response from −45 to 24 ms only in the posterior STG. We interpret the visual‐induced changes prior to speech onset as reflecting crossmodal prediction of speech signals. In contrast, modulations after sound onset may reflect a decrease in sustained feedforward auditory activity. These results are consistent with models that posit multiple distinct mechanisms supporting audiovisual speech perception.Intracranial EEG data from a large cohort (n = 21) of patients shows that audiovisual speech elicits multiple distinct patterns of neural activity within the STG and adjacent cortex, occurring across separate frequencies and spatial/temporal distributions. Our results suggest that visual modulation of auditory speech perception utilizes multiple mechanisms, potentially reflecting independent sources of information.
dc.publisherAcademic Press
dc.publisherWiley Periodicals, Inc.
dc.subject.otherspeech
dc.subject.otheraudiovisual
dc.subject.otherECoG
dc.subject.otheriEEG
dc.subject.otherintracranial
dc.subject.othermultisensory
dc.subject.othersEEG
dc.titleVisual speech differentially modulates beta, theta, and high gamma bands in auditory cortex
dc.typeArticle
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelNeurosciences
dc.subject.hlbtoplevelHealth Sciences
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/170934/1/ejn15482-sup-0001-Supplemental-Materials.pdf
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/170934/2/ejn15482.pdf
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/170934/3/ejn15482_am.pdf
dc.identifier.doi10.1111/ejn.15482
dc.identifier.sourceEuropean Journal of Neuroscience
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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