10/20, 10/10, and 10/5 systems revisited: Their validity as relative head-surface-based positioning systems
10/20, 10/10, and 10/5 systems revisited: Their validity as relative head-surface-based positioning systems
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DOI：
10.1016/j.neuroimage.2006.09.024
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发表时间：
2007-02-15
期刊：
影响因子：
5.7
通讯作者：
Dan, Ippeita
中科院分区：
文献类型：
--
作者：
Jurcak, Valer;Tsuzuki, Daisuke;Dan, Ippeita
随着多通道EEG硬件系统的出现以及地形图和断层扫描信号源定位方法的同时发展，国际10/20系统（具有21个电极的电极定位标准系统）扩展到更高密度的电极设置，例如10/10和10/5系统，允许超过300个电极位置。然而，它们作为基于相对头表面的定位系统的有效性尚未被检验。我们之前开发了一种虚拟10/20测量算法，可以分析任何结构MR头部和大脑图像。将该方法扩展到虚拟10/10和10/5测量算法，我们分析了17名健康受试者的MR图像。将10/10和1015系统获得的头皮位置标准化为蒙特利尔神经研究所（MNI）立体定向坐标，并评估其空间变异性。我们描述和检查的空间变异性的影响，由于选择定位系统和标志放置策略。只要为特定系统提供详细的规则，它就会在头皮上产生精确的标志位置。此外，我们评估了有效的空间分辨率的329头皮标志位置的10/5系统的多学科研究。只要提供一个详细的标志点设置规则，在相邻两个位置不重叠的情况下，可以有效地设置241个头皮位置。重要的是，10/10的位置可以在头皮上很好地分离而不重叠。这项研究提出了一个参考框架，建立有效的空间分辨率的10/20，10/10和10/5系统作为相对头表面定位系统。(c)2006年爱思唯尔公司All rights reserved.
With the advent of multi-channel EEG hardware systems and the concurrent development of topographic and tomographic signal source localization methods, the international 10/20 system, a standard system for electrode positioning with 21 electrodes, was extended to higher density electrode settings such as 10/10 and 10/5 systems, allowing more than 300 electrode positions. However, their effectiveness as relative head-surface-based positioning systems has not been examined. We previously developed a virtual 10/20 measurement algorithm that can analyze any structural MR head and brain image. Extending this method to the virtual 10/10 and 10/5 measurement algorithms, we analyzed the MR images of 17 healthy subjects. The acquired scalp positions of the 10/10 and 1015 systems were normalized to the Montreal Neurological Institute (MNI) stereotactic coordinates and their spatial variability was assessed. We described and examined the effects of spatial variability due to the selection of positioning systems and landmark placement strategies. As long as a detailed rule for a particular system was provided, it yielded precise landmark positions on the scalp. Moreover, we evaluated the effective spatial resolution of 329 scalp landmark positions of the 10/5 system for multi-subject studies. As long as a detailed rule for landmark setting was provided, 241 scalp positions could be set effectively when there was no overlapping of two neighboring positions. Importantly, 10/10 positions could be well separated on a scalp without overlapping. This study presents a referential framework for establishing the effective spatial resolutions of 10/20, 10/10, and 10/5 systems as relative head-surface-based positioning systems. (c) 2006 Elsevier Inc. All rights reserved.