Post-movement beta rebound is generated in motor cortex: Evidence from neuromagnetic recordings
Post-movement beta rebound is generated in motor cortex: Evidence from neuromagnetic recordings
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DOI：
10.1016/j.neuroimage.2006.06.005
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发表时间：
2006-09-01
期刊：
影响因子：
5.7
通讯作者：
Cheyne, Douglas
中科院分区：
文献类型：
--
作者：
Jurkiewicz, Michael T.;Gaetz, William C.;Cheyne, Douglas
自主运动伴随着皮层节律的幅度变化，这可能是感觉运动区功能激活的结果。最近，参与在运动（运动后β反弹，PMBR）之后在β（15-30 Hz）频带内增加功率的神经发生器的位置已经受到质疑[Parkes，L.M，Bastiaansen，M.C.M，Norris，D. G.，2006.结合EEG和fMRI研究运动后β反弹。NeuroImage 29，685-696.]。我们使用的合成孔径磁强计（SAM）的空间滤波方法，以确定的时间过程和位置的振荡变化的β和μ（8-14赫兹）频带内的自愿运动的性能。神经磁活动记录从10名成年受试者在外展的右手食指。相对于运动前的基线活动，计算运动期间和运动后的β和μ源功率的变化。在运动过程中观察到β带活动（事件相关去极化，ERD）的下降，与运动后开始230 +/- 170毫秒的强烈增加（PMBR），持续680 - 170毫秒。Mu带ERD在运动过程中和运动后观察到，几乎没有运动后反弹。β和亩ERD双边本地化的手区域的posteentralgyros，而PMBR双边本地化的手区域的precentralgyros（运动皮层）。PMBR和β ERD均在运动侧对侧最强。这些结果提供了进一步的证据表明，运动影响独立的皮层节奏在感觉运动区，并确认了以前的报告，中央前发电机的PMBR在该地区的运动皮层，与postcentral发电机的β和μ ERD在运动过程中。(c)2006年爱思唯尔公司All rights reserved.
Voluntary movements are accompanied by amplitude changes in cortical rhythms presumably as a result of functional activation of sensorimotor areas. Recently, the location of the neural generators involved in increasing power within the beta (15-30 Hz) frequency band following movement (post-movement beta rebound, PMBR) has come into question [Parkes, L.M, Bastiaansen, M.C.M, Norris, D.G., 2006. Combining EEG and fMRI to investigate the post-movement beta rebound. NeuroImage 29, 685-696.]. We used the synthetic aperture magnetometry (SAM) spatial filtering method to identify the time course and location of oscillatory changes within the beta and mu (8-14 Hz) frequency bands during the performance of voluntary movements. Neuromagnetic activity was recorded from 10 adult subjects during abduction of the right index finger. Changes in beta and mu source power were calculated for periods during and following movement, relative to pre-movement baseline activity. Decreases in beta band activity (event-related desynchronization, ERD) were observed during movement, with a strong increase (PMBR) beginning 230 +/- 170 ms following movement, lasting for 680 170 ms. Mu band ERD was observed both during and following movement, with little to no post-movement rebound. Beta and mu ERD were localized bilaterally to the hand region of posteentral gyros whereas PMBR was localized bilaterally to the hand region of precentral gyros (motor cortex). Both PMBR and beta ERD were strongest contralateral to the side of movement. These results provide further evidence that movement influences independent cortical rhythms in sensorimotor areas, and confirm previous reports of precentral generators of PMBR in the region of motor cortex, with postcentral generators of beta and mu ERD during movement. (c) 2006 Elsevier Inc. All rights reserved.