MEG characterization of spontaneous alpha rhythm in the human brain
MEG characterization of spontaneous alpha rhythm in the human brain
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DOI：
10.1023/a:1022233828999
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发表时间：
1999-03-01
期刊：
影响因子：
2.7
通讯作者：
Endo, H
中科院分区：
文献类型：
--
作者：
Ciulla, C;Takeda, T;Endo, H
目前的研究通过结合使用全皮层神经磁力计和磁共振成像来研究人类大脑的自发α节律。10名受试者被要求在放松的清醒状态下闭上或睁开眼睛休息，他们记录了自发脑活动的单一试验。在一年半的时间内进行了MEG测量。10名受试者中有8名证实了结果的可复制性。对于3名受试者，α节律未显示出由于睁开眼睛而导致的任何降低。场图模式和估计源的位置在α节律的振荡的每一个突发期间都是持续静止的。偶极子集中在集群，表明存在几个空间分布的源。距状沟、顶枕沟和周围的枕区和顶枕区被确定为大脑皮质部位，α节律可能起源于此。对于四名受试者，大多数的来源位于附近或在距状裂，而对于五名受试者，他们位于附近或在顶枕沟和其余的受试者，他们平均分为两个生成网站。
The present piece of research studied the spontaneous alpha rhythm of the human brain by combining the use of a whole-cortex neuromagnetometer and Magnetic Resonance imaging. Single trials of spontaneous brain activity were recorded from ten human subjects asked to rest, with their eyes either closed or open, in relaxed wakefulness. MEG measurements were conducted over a period of one and a half years. The replicability of the results was confirmed for eight subjects out of ten. For three subjects, the alpha rhythm did not show any reductions due to the opening of the eyes. Both field map pattern and location of the estimated source were persistently stationary during each of the bursts of oscillations of the alpha rhythm. Dipoles were concentrated in clusters, indicating the existence of several spatially distributed sources. The calcarine fissure, the parieto-occipital sulcus and the surrounding occipital and parieto-occipital areas were identified as cortical sites of the brain where the alpha rhythm may originate. For four subjects, the majority of the sources were located near or in the calcarine fissure, while for five subjects, they were located near or in the parieto-occipital sulcus and for the remaining subject they were equally divided between the two generation sites.