Pratt H, Bleich N, Har'el Z, Golos E
Int J Biomed Comput. 1986 May;18(3-4):249-59. doi: 10.1016/0020-7101(86)90021-8.
Three orthogonally derived voltage-time records, when plotted simultaneously on three-dimensional voltage-voltage-voltage coordinates, produce a 3-Channel Lissajous' Trajectory (3CLT). 3CLTs of short latency visual evoked potentials (SVEP) were obtained for 8 adult humans (16 eyes) in response to monocular flash stimulation. Intersubject variability of 3CLT of SVEP was small enough to enable identification along the trajectory of comparable planar-segments of approx. 3-5 ms duration across subjects. In each planar-segment, the point at which the trajectory exhibited marked bending was noted. These points were called apices and they corresponded to maxima in the trajectory's distance from the origin (Trajectory Amplitude). Intersubject variability in apex latencies was comparable to, or smaller than, peak latency variability of single-channel records. 3CLT of SVEP consisted of 8 planar-segments in each of the latency ranges of 0-40, 40-70 and 70-100 ms. Analysis of 3CLT, combining the criteria of segment planarity, apices and trajectory amplitude peaks, enabled differentiation between components that had been considered the same in surface distribution studies. 3CLT of SVEP seemed to be influenced by the direction of propagation along the visual pathway.
将三个正交导出的电压-时间记录同时绘制在三维电压-电压-电压坐标上时，会产生一个三通道利萨如图形轨迹（3CLT）。对8名成年人（16只眼睛）进行单眼闪光刺激，获得了短潜伏期视觉诱发电位（SVEP）的3CLT。SVEP的3CLT在个体间的变异性足够小，能够沿着轨迹识别出不同受试者中持续时间约为3-5毫秒的可比平面段。在每个平面段中，记录轨迹出现明显弯曲的点。这些点被称为顶点，它们对应于轨迹距原点距离（轨迹幅度）的最大值。顶点潜伏期的个体间变异性与单通道记录的峰值潜伏期变异性相当或更小。SVEP的3CLT在0-40、40-70和70-100毫秒的每个潜伏期范围内由8个平面段组成。结合段平面性、顶点和轨迹幅度峰值标准对3CLT进行分析，能够区分在表面分布研究中被认为相同的成分。SVEP的3CLT似乎受沿视觉通路传播方向的影响。
