TY  - JOUR
A1  - Gehrig, Johannes
A1  - Wibral, Michael
A1  - Arnold, Christiane
A1  - Kell, Christian Alexander
T1  - Setting up the speech production network : how oscillations contribute to lateralized information routing
T2  - Frontiers in psychology
N2  - 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.
KW  - preparation
KW  - task set
KW  - alpha band
KW  - beta band
KW  - phase coupling
KW  - auditory cortex
KW  - MEG
KW  - DCM
Y1  - 2012
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/25216
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-252166
SN  - 1664-1078
VL  - 3
IS  - 169
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  -