Parker D M, Salzen E A, Lishman J R
Electroencephalogr Clin Neurophysiol. 1982 Apr;53(4):427-35. doi: 10.1016/0013-4694(82)90007-4.
VEPs were elicited by sinusoidal grating patterns of differing spatial frequencies presented in each of the 4 quadrants of the visual field. Analysis of the early wave of the VEP indicated a pattern of polarity inversions when wave forms were compared across the horizontal meridian of the visual field. With the exception of low spatial frequencies, clear polarity inversions also occurred across the vertical meridian of the visual field in the case of laterally placed electrodes. Comparison of the clearly identifiable early peak with records for the same subject using central field stimulation showed the complexity of the latter records and the inherent difficulty of isolating and interpreting specific component waves of the VEP without adequate topographical data from quadrant stimulation.
通过在视野的四个象限中分别呈现不同空间频率的正弦光栅图案来诱发视觉诱发电位（VEP）。对VEP早期波的分析表明，当在视野的水平子午线上比较波形时，存在极性反转模式。除了低空间频率外，对于横向放置电极的情况，在视野的垂直子午线上也出现了明显的极性反转。将清晰可辨的早期峰值与同一受试者使用中心视野刺激的记录进行比较，结果显示后者记录的复杂性，以及在没有来自象限刺激的足够地形数据的情况下，分离和解释VEP特定成分波所固有的困难。
