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建立言语产生网络：振荡如何促进信息的侧向路由。

Setting up the speech production network: how oscillations contribute to lateralized information routing.

作者信息

Gehrig Johannes, Wibral Michael, Arnold Christiane, Kell Christian A

机构信息

Cognitive Neuroscience Group, Department of Neurology, Brain Imaging Center, Goethe University Frankfurt, Germany.

出版信息

Front Psychol. 2012 Jun 6;3:169. doi: 10.3389/fpsyg.2012.00169. eCollection 2012.

DOI:10.3389/fpsyg.2012.00169
PMID:22685442
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3368321/
Abstract

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.

摘要

言语产生涉及广泛分布的脑区。这项脑磁图（MEG）研究聚焦于有助于该网络建立的频谱-时间动态变化。在21名执行提示-目标阅读范式的参与者中，我们在时频域分析了公开阅读和隐蔽阅读准备期间的局部振荡，并使用波束形成对源进行定位。通过比较半球内和半球间β相位耦合的不同动态因果模型来研究网络动态变化。虽然在双侧前额叶皮层中，任何任务准备都发现了宽带低频效应，但公开言语产生的准备与颞叶皮层中左侧化的α和β抑制以及运动相关脑区的β抑制特别相关。整个言语产生网络中的β相位耦合通过对公开阅读的预期进行调节。我们提出，言语产生网络建立背后的过程通过β同步连接相关脑区，并通过抑制抑制性α和β振荡为网络进行左侧化信息路由做准备。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/168b8160cd79/fpsyg-03-00169-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/7dacbc44bfb9/fpsyg-03-00169-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/1721109b0c3f/fpsyg-03-00169-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/2b22067d2053/fpsyg-03-00169-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/94f0143ba7ca/fpsyg-03-00169-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/575f2b9cea47/fpsyg-03-00169-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/8ecdc134c497/fpsyg-03-00169-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/168b8160cd79/fpsyg-03-00169-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/7dacbc44bfb9/fpsyg-03-00169-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/1721109b0c3f/fpsyg-03-00169-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/a4fe1e900f82/fpsyg-03-00169-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/96b8d1eb52bf/fpsyg-03-00169-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/2b22067d2053/fpsyg-03-00169-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/94f0143ba7ca/fpsyg-03-00169-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/575f2b9cea47/fpsyg-03-00169-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/8ecdc134c497/fpsyg-03-00169-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e73/3368321/168b8160cd79/fpsyg-03-00169-g009.jpg

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