Crognale M A, Kelly J P, Weiss A H, Teller D Y
Department of Psychology, University of Washington, Seattle 98195-1525, USA.
Vision Res. 1998 Nov;38(21):3283-92. doi: 10.1016/s0042-6989(98)00074-1.
Most prior visual evoked potential (VEP) research on the development of color vision has employed pattern-reversing stimuli that are not optimal for producing chromatic responses. We measured infant VEPs using low spatial frequency, onset-offset stimuli, modulated along the three axes of a cone-based color space (Derrington et al. [J. Physiol 1984;357, 241-265.]). Three color-normal infants were tested in a longitudinal design over the first postnatal year. One red/green color-deficient infant was also tested at 197 days. We found that VEP responses to S-axis (tritan) stimuli have their initial onset later than responses to red/green (L-M) or achromatic stimuli, and that developmental changes in VEP waveforms are more complex and longer lasting for chromatic than for achromatic stimuli. Possible mechanisms underlying these changes are discussed.
以往大多数关于色觉发育的视觉诱发电位（VEP）研究都采用了模式翻转刺激，而这种刺激对于产生色觉反应并非最优选择。我们使用沿基于视锥细胞的颜色空间的三个轴调制的低空间频率、开-关刺激来测量婴儿的VEP（Derrington等人[《生理学杂志》1984年；357卷，241 - 265页]）。在出生后的第一年，对三名色觉正常的婴儿进行了纵向设计测试。一名红绿色觉缺陷婴儿也在197天时接受了测试。我们发现，VEP对S轴（蓝黄色）刺激的初始起始时间比对红/绿（L - M）或非彩色刺激的起始时间晚，并且VEP波形的发育变化对于彩色刺激而言比对非彩色刺激更复杂且持续时间更长。文中讨论了这些变化背后可能的机制。
