Computing the center of mass for traveling alpha waves in the human brain
Computing the center of mass for traveling alpha waves in the human brain
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DOI：
10.1016/j.brainres.2007.01.114
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发表时间：
2007-05-11
期刊：
影响因子：
2.9
通讯作者：
Flores, Amira
中科院分区：
文献类型：
--
作者：
Manjarrez, Elias;Vazquez, Montserrat;Flores, Amira
脑的行波现象是一个有趣的研究领域，其机制和神经生物学基础自20世纪50年代以来一直未知。本研究提供了一种新的方法来计算旅行阿尔法波使用质心算法。脑电图α波是具有特征频率范围和对闭上的眼睛的反应的振荡。来自定性观察的几条证据表明，α波代表了人脑中具有特定轨迹的扩散波过程。我们发现，在用30个电极记录的某个α波峰值期间，轨迹开始和结束于大脑的不同区域，主要是额枕、额额或枕额，但在α波出现最大阳性时，轨迹的位置在中心区域附近有一个确定的位置。因此，我们观察到，轨迹总是在中央区域周围交叉，从大脑的一个区域到另一个区域。在一个α爆发中的不同α波峰和不同受试者中观察到相似的轨迹模式，平均速度为2.1 +/- 0.29 m/s。我们发现，我们的所有结果在所有受试者中都是清晰和可重复的。据我们所知，本方法文件的第一个明确的描述扩散波过程中的一个奇异的模式在人脑中的质心算法。(c)2007 Elsevier B. V.保留所有权利。
The phenomenon of traveling waves of the brain is an intriguing area of research, and its mechanisms and neurobiological bases have been unknown since the 1950s. The present study offers a new method to compute traveling alpha waves using the center of mass algorithm. Electroencephalographic alpha waves are oscillations with a characteristic frequency range and reactivity to closed eyes. Several lines of evidence derived from qualitative observations suggest that the alpha waves represent a spreading wave process with specific trajectories in the human brain. We found that during a certain alpha wave peak recorded with 30 electrodes the trajectory starts and ends in distinct regions of the brain, mostly frontal-occipital, frontal-frontal, or occipital-frontal, but the position of the trajectory at the time in which the maximal positivity of the alpha wave occurs has a definite position near the central regions. Thus we observed that the trajectory always crossed around the central zones, traveling from one region to another region of the brain. A similar trajectory pattern was observed for different alpha wave peaks in one alpha burst, and in different subjects, with a mean velocity of 2.1 +/- 0.29 m/s. We found that all our results were clear and reproducible in all of the subjects. To our knowledge, the present method documents the first explicit description of a spreading wave process with a singular pattern in the human brain in terms of the center of mass algorithm. (c) 2007 Elsevier B.V. All rights reserved.