Speech perception, production, and the sensorimotor mu rhythm

David Jenson; David Thornton; Tim Saltuklaroglu; Ashley Harkrider

doi:10.1109/BSEC.2014.6867736

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Speech perception, production, and the sensorimotor mu rhythm

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Speech perception, production, and the sensorimotor mu rhythm

David Jenson, David Thornton, Tim Saltuklaroglu and Ashley Harkrider

Proceedings of the 2014 Biomedical Sciences and Engineering Conference, pp.1-4

05/01/2014

DOI: https://doi.org/10.1109/BSEC.2014.6867736

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https://hdl.handle.net/2376/125531

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Abstract

Barium

EEG

ICA

Production

Rhythm

sensorimotor integration

Speech

speech perception

Speech processing

speech production

Electroencephalography

Noise

The EEG mu (μ) rhythm is considered a measure of sensorimotor integration. This rhythm is commonly identified by co-occuring peaks at ~10'Hz(alpha) and ~20 Hz (beta) across the sensorimotor cortex. Suppression of the power within peaks are thought to reflect somatosensory and motor aspects of processing respectively. Suppression of μ power (especially in the beta peak) has been found when performing, imagining or perceiving relevant action (e.g., while watching hand movements and oro-facial movements). μ suppression has also been found to visual speech perception, listening to speech in noise, and when mentally segmenting speech for auditory discrimination, suggesting that it is a sensitive measure of audio-motor integration in speech. The two main goals in this study are to bolster understanding of the timing and function of dorsal stream activity in speech perception by examining ERS/ERD patterns in quiet and noisy discrimination conditions and to provide initial evidence that, via the application of ICA / ERSP, the use of EEG can be extended effectively into speech production. 17 of 20 participants provided left and right p components that were common to perception and production tasks. The most probably source of these components was the premotor cortex (BA 6) with primary motor cortex (BA 4) and primary somatosensory (BA 2/3) cortex providing additional possible sources. Fewer (8 and 7 of 20) participants provided components with average equivalent dipoles emanating from BA 22 and BA 7, respectively, with alpha activity suggesting entrainment within the dorsal stream.

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Title: Speech perception, production, and the sensorimotor mu rhythm
Creators: David Jenson (Author)
David Thornton (Author) - Audiology & Speech Pathology, Univ. of Tennessee Health Sci. Center, Knoxville, TN, USA
Tim Saltuklaroglu (Author) - Audiology & Speech Pathology, Univ. of Tennessee Health Sci. Center, Knoxville, TN, USA
Ashley Harkrider (Author) - Audiology & Speech Pathology, Univ. of Tennessee Health Sci. Center, Knoxville, TN, USA
Publication Details: Proceedings of the 2014 Biomedical Sciences and Engineering Conference, pp.1-4
Academic Unit: Speech and Hearing Sciences, Department of
Publisher: IEEE
Identifiers: 99901007439401842
Language: English
Resource Type: Journal article