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Increased connectivity among sensory and motor regions during visual and audiovisual speech perception

View ORCID ProfileJonathan E. Peelle, Brent Spehar, Michael S. Jones, Sarah McConkey, Joel Myerson, Sandra Hale, Mitchell S. Sommers, Nancy Tye-Murray
doi: https://doi.org/10.1101/2020.12.15.422726
Jonathan E. Peelle
1Department of Otolaryngology, Washington University in St. Louis, St. Louis MO USA
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  • For correspondence: jpeelle@wustl.edu
Brent Spehar
1Department of Otolaryngology, Washington University in St. Louis, St. Louis MO USA
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Michael S. Jones
1Department of Otolaryngology, Washington University in St. Louis, St. Louis MO USA
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Sarah McConkey
1Department of Otolaryngology, Washington University in St. Louis, St. Louis MO USA
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Joel Myerson
2Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis MO USA
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Sandra Hale
2Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis MO USA
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Mitchell S. Sommers
2Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis MO USA
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Nancy Tye-Murray
1Department of Otolaryngology, Washington University in St. Louis, St. Louis MO USA
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Abstract

In everyday conversation, we usually process the talker’s face as well as the sound of their voice. Access to visual speech information is particularly useful when the auditory signal is degraded. Here we used fMRI to monitor brain activity while adults (n = 60) were presented with visual-only, auditory-only, and audiovisual words. As expected, audiovisual speech perception recruited both auditory and visual cortex, with a trend towards increased recruitment of premotor cortex in more difficult conditions (for example, in substantial background noise). We then investigated neural connectivity using psychophysiological interaction (PPI) analysis with seed regions in both primary auditory cortex and primary visual cortex. Connectivity between auditory and visual cortices was stronger in audiovisual conditions than in unimodal conditions, including a wide network of regions in posterior temporal cortex and prefrontal cortex. Taken together, our results suggest a prominent role for cross-region synchronization in understanding both visual-only and audiovisual speech.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • https://osf.io/qxcu8/

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted December 15, 2020.
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Increased connectivity among sensory and motor regions during visual and audiovisual speech perception
Jonathan E. Peelle, Brent Spehar, Michael S. Jones, Sarah McConkey, Joel Myerson, Sandra Hale, Mitchell S. Sommers, Nancy Tye-Murray
bioRxiv 2020.12.15.422726; doi: https://doi.org/10.1101/2020.12.15.422726
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Increased connectivity among sensory and motor regions during visual and audiovisual speech perception
Jonathan E. Peelle, Brent Spehar, Michael S. Jones, Sarah McConkey, Joel Myerson, Sandra Hale, Mitchell S. Sommers, Nancy Tye-Murray
bioRxiv 2020.12.15.422726; doi: https://doi.org/10.1101/2020.12.15.422726

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