Desmedt J E, Chalklin V
Brain Research Unit, University of Brussels, Belgium.
Electroencephalogr Clin Neurophysiol. 1989 Sep-Oct;74(5):359-66. doi: 10.1016/0168-5597(89)90003-8.
A method is described for computing a Z estimator for the quantitative comparison of topographical patterns in 2 maps. Z can assume values between 1 and -1. The procedure is illustrated on a 3-shell head model for different configurations of current dipoles in the head space. The sensitivity of Z estimation can be adjusted by different weighting procedures or by using an average reference. When Z = 1 indicates identity of the set of active dipoles in the 2 maps compared, a dilation factor can be computed to estimate the enhanced or reduced activity of these generators.
本文描述了一种用于计算Z估计量的方法，该方法用于对两张地图中的地形模式进行定量比较。Z的值可以在1到 -1之间。该过程在一个三壳头部模型上进行了说明，该模型用于头部空间中不同配置的电流偶极子。Z估计的灵敏度可以通过不同的加权程序或使用平均参考来调整。当Z = 1表示所比较的两张地图中活动偶极子集相同时，可以计算一个扩张因子来估计这些发生器增强或减弱的活动。
