Activity in anterior sensorimotor regions is found in speech production and some perception tasks. Yet, how sensorimotor integration supports these functions is unclear due to a lack of data examining the timing of activity from these regions. Beta (similar to 20 Hz) and alpha (similar to 10 Hz) spectral power within the EEG mu rhythm are considered indices of motor and somatosensory activity, respectively. In the current study, perception conditions required discrimination (same/different) of syllables pairs (/ba/ and /da/) in quiet and noisy conditions. Production conditions required covert and overt syllable productions and overt word production. Independent component analysis was performed on EEG data obtained during these conditions to (1) identify clusters of components common to all conditions and (2) examine real-time event-related spectral perturbations (ERSP) within alpha and beta bands. 17 and 15 out of 20 participants produced left and right mu-components, respectively, localized to precentral gyri. Discrimination conditions were characterized by significant (pFDR < 0.05) early alpha event-related synchronization (ERS) prior to and during stimulus presentation and later alpha event-related desynchronization (ERD) following stimulus offset. Beta ERD began early and gained strength across time. Differences were found between quiet and noisy discrimination conditions. Both overt syllable and word productions yielded similar alpha/beta ERD that began prior to production and was strongest during muscle activity. Findings during covert production were weaker than during overt production. One explanation for these findings is that mu-beta ERD indexes early predictive coding (e.g., internal modeling) and/or overt and covert attentional/motor processes. mu-alpha ERS may index inhibitory input to the premotor cortex from sensory regions prior to and during discrimination, while mu-alpha ERD may index sensory feedback during speech rehearsal and production.
Journal article
Temporal dynamics of sensortmotor integration in speech perception and production: independent component analysis of EEG data
Frontiers in psychology, Vol.5
07/10/2014
PMID: 25071633
CC BY V4.0, Open Access
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- Title
- Temporal dynamics of sensortmotor integration in speech perception and production: independent component analysis of EEG data
- Creators
- David Jenson (Author)Andrew L. Bowers (Author) - Univ Arkansas, Dept Commun Disorders, Fayetteville, AR 72701 USAAshley Harkrider (Author) - Univ Tennessee, Hlth Sci Ctr, Dept Audiol & Speech Pathol, Knoxvilee, TN 37996 USADavid Thornton (Author) - Univ Tennessee, Hlth Sci Ctr, Dept Audiol & Speech Pathol, Knoxvilee, TN 37996 USAM. Cuellar (Author) - Midwestern Univ, Coll Hlth Sci, Speech Language Pathol Program, Chicago, IL USATim Saltuklaroglu (Author) - Univ Tennessee, Hlth Sci Ctr, Dept Audiol & Speech Pathol, Knoxvilee, TN 37996 USA
- Publication Details
- Frontiers in psychology, Vol.5
- Academic Unit
- Speech and Hearing Sciences, Department of
- Publisher
- Frontiers Media Sa
- Number of pages
- 17
- Identifiers
- 99901007439901842
- Language
- English
- Resource Type
- Journal article