High-density electroencephalography was used to evaluate cortical activity during speech comprehension via a sentence verification task. Twenty-four participants assigned true or false to sentences produced with 3 noise-vocoded channel levels (1-unintelligible, 6-decipherable, 16-intelligible), during simultaneous EEG recording. Participant data were sorted into higher- (HP) and lower-performing (LP) groups. The identification of a late-event related potential for LP listeners in the intelligible condition and in all listeners when challenged with a 6-Ch signal supports the notion that this induced potential may be related to either processing degraded speech, or degraded processing of intelligible speech. Different cortical locations are identified as neural generators responsible for this activity; HP listeners are engaging motor aspects of their language system, utilizing an acoustic–phonetic based strategy to help resolve the sentence, while LP listeners do not. This study presents evidence for neurophysiological indices associated with more or less successful speech comprehension performance across listening conditions.
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- Cortical Characterization of the Perception of Intelligible and Unintelligible Speech Measured Via High-Density Electroencephalography
- Utianski, Rene (Author)
- Caviness, John N. (Author)
- Liss, Julie (Author)
- College of Health Solutions (Contributor)
- Digital object identifier: 10.1016/j.bandl.2014.10.008
- Identifier TypeInternational standard serial numberIdentifier Value0093-934X
- Identifier TypeInternational standard serial numberIdentifier Value1090-2155
- NOTICE: this is the author's version of a work that was accepted for publication in BRAIN AND LANGUAGE. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in BRAIN AND LANGUAGE, 140, 49-54. DOI: 10.1016/j.bandl.2014.10.008, opens in a new window
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Utianski, Rene L., Caviness, John N., & Liss, Julie M. (2015). Cortical characterization of the perception of intelligible and unintelligible speech measured via high-density electroencephalography. BRAIN AND LANGUAGE, 140, 49-54. http://dx.doi.org/10.1016/j.bandl.2014.10.008