Porciatti V
Hum Neurobiol. 1984;3(2):97-102.
Pattern VEP measurements in infants below 2 months of age do not seem to show appreciable developmental changes in contrast sensitivity and cut-off spatial frequency in spite of the marked structural maturation that takes place in the visual system. This paper investigates the temporal parameters of the pattern VEP in order to establish electrophysiological criteria in detecting developmental changes of the visual pathway in this age range. In comparison with the adult, the neonatal response latency is delayed about 155 ms. The delay shortens during the first two months with a slope of around 1 ms/day. The neonatal temporal and spatial tuning functions, as compared with the adult ones, are markedly shifted towards lower temporal and spatial frequencies respectively, and do not show measurable changes in the early post-natal period.
尽管视觉系统发生了显著的结构成熟，但2个月以下婴儿的图形视觉诱发电位（VEP）测量似乎并未显示出对比敏感度和截止空间频率有明显的发育变化。本文研究了图形VEP的时间参数，以便建立检测该年龄范围内视觉通路发育变化的电生理标准。与成年人相比，新生儿的反应潜伏期延迟约155毫秒。在出生后的头两个月，延迟以约1毫秒/天的斜率缩短。与成年人相比，新生儿的时间和空间调谐功能分别明显向较低的时间和空间频率偏移，并且在出生后的早期没有显示出可测量的变化。
