Pratt H, Har'el Z, Golos E
Electroencephalogr Clin Neurophysiol. 1984 Jul;58(1):83-8. doi: 10.1016/0013-4694(84)90204-9.
Three-channel Lissajous' trajectories (3CLTs) of auditory brain-stem evoked potentials (ABEPs) were obtained for a group of 15 normal humans. 3CLTs were studied using geometric spatial descriptors of rate of bending (curvature), local planarity (torsion), as well as the parameters of best fit planes along the trajectory. Point-by-point analysis enabled objective determination of apices (curvature maxima) which divided the trajectory to curvilinear segments. Consecutive apices defined planar segments (each consisting of two curvilinear segments) along the trajectory. Of the two possibilities of arranging apices in the middle of planar segments only one yielded consistently planar segments. The alternative set of apex triads represented transitions between truly planar segments. The variability of position and orientation measures of planar segments was greater than that of apex latencies and plane limits. The significance of planes, as well as their generation, in 3CLT of ABEP, remains to be studied.
为15名正常受试者获取了听性脑干诱发电位（ABEP）的三通道李萨如图形轨迹（3CLT）。使用弯曲率（曲率）、局部平面度（挠率）的几何空间描述符以及沿轨迹的最佳拟合平面参数对3CLT进行了研究。逐点分析能够客观地确定将轨迹划分为曲线段的顶点（曲率最大值）。连续的顶点定义了沿轨迹的平面段（每个平面段由两个曲线段组成）。在平面段中间排列顶点的两种可能性中，只有一种能始终产生平面段。另一组顶点三元组代表真正平面段之间的过渡。平面段的位置和方向测量的变异性大于顶点潜伏期和平面界限的变异性。ABEP的3CLT中平面的意义及其产生仍有待研究。
