Setting up the speech production network : how oscillations contribute to lateralized information routing
- Speech production involves widely distributed brain regions. This MEG study focuses on the spectro-temporal dynamics that contribute to the setup of this network. In 21 participants performing a cue-target reading paradigm, we analyzed local oscillations during preparation for overt and covert reading in the time-frequency domain and localized sources using beamforming. Network dynamics were studied by comparing different dynamic causal models of beta phase coupling in and between hemispheres. While a broadband low frequency effect was found for any task preparation in bilateral prefrontal cortices, preparation for overt speech production was specifically associated with left-lateralized alpha and beta suppression in temporal cortices and beta suppression in motor-related brain regions. Beta phase coupling in the entire speech production network was modulated by anticipation of overt reading. We propose that the processes underlying the setup of the speech production network connect relevant brain regions by means of beta synchronization and prepare the network for left-lateralized information routing by suppression of inhibitory alpha and beta oscillations.
| Author: | Johannes GehrigORCiDGND, Michael WibralORCiDGND, Christiane Arnold, Christian KellORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-252166 |
| DOI: | https://doi.org/10.3389/fpsyg.2012.00169 |
| ISSN: | 1664-1078 |
| Pubmed Id: | https://pubmed.ncbi.nlm.nih.gov/22685442 |
| Parent Title (English): | Frontiers in psychology |
| Publisher: | Frontiers Research Foundation |
| Place of publication: | Lausanne |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2012/06/06 |
| Date of first Publication: | 2012/06/06 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2012/06/21 |
| Tag: | DCM; MEG; alpha band; auditory cortex; beta band; phase coupling; preparation; task set |
| Volume: | 3 |
| Issue: | 169 |
| Page Number: | 9 |
| HeBIS-PPN: | 357460073 |
| Institutes: | Medizin / Medizin |
| Dewey Decimal Classification: | 1 Philosophie und Psychologie / 15 Psychologie / 150 Psychologie |
| 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit | |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung 3.0 |
