Previc F H
Vision Res. 1986;26(12):1897-907. doi: 10.1016/0042-6989(86)90116-1.
The spatial and temporal tuning of the luminance and chromatic systems were investigated using visual evoked potentials (VEPs) recorded from rhesus monkeys. VEPs were recorded from eight bipolar electrodes which were chronically implanted in the foveal projection region of area 17 in two monkeys. They were elicited by luminance (yellow-black) and chromatic (red-green) since-wave gratings which varied in spatial frequency (1, 4, 8 and 12 c/deg) and temporal frequency (3, 6, 10 and 15 Hz). The findings showed that chromatic VEPs exhibit low-pass tuning in both the spatial and temporal domains, whereas luminance VEPs exhibit bandpass tuning in the spatial domain and low-pass tuning in the temporal domain. The spatial tuning findings are consistent with the psychophysical literature, while the low-pass temporal tuning shown by the luminance VEPs was attributed to various cancellations and distortions in the suprathreshold VEP at high flicker rates and to the effects of the anesthesia.
利用从恒河猴记录的视觉诱发电位（VEP），对亮度和颜色系统的时空调谐进行了研究。从两只猴子的17区中央凹投射区域长期植入的八个双极电极记录VEP。通过空间频率（1、4、8和12周/度）和时间频率（3、6、10和15赫兹）变化的亮度（黄-黑）和颜色（红-绿）正弦波光栅诱发VEP。研究结果表明，颜色VEP在空间和时间域均表现出低通调谐，而亮度VEP在空间域表现出带通调谐，在时间域表现出低通调谐。空间调谐结果与心理物理学文献一致，而亮度VEP显示的低通时间调谐归因于高闪烁率下阈上VEP中的各种抵消和失真以及麻醉的影响。
