Kimura Eiji, Young Rockefeller S L
Department of Psychology, Faculty of Letters, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
Vision Res. 2010 Mar 5;50(5):489-96. doi: 10.1016/j.visres.2010.01.001. Epub 2010 Jan 7.
We show that irradiance-coding alone cannot explain the sustained pupillary constrictions evoked by chromatic and luminance variations in a stimulus. For example, stimulus modulations that decremented the contrasts in L- and M-cones as well as rods and melanopsin photoreceptors produced sustained constrictions rather than the predicted dilations. Although the sustained responses are unidirectional, we confirm that they are at least partially mediated by an L- and M-cone opponent interaction. We discuss the implications of sustained unidirectional chromatic responses in view of the function of the pupil to improve the clarity of vision.
我们表明，仅辐照度编码无法解释由刺激中的色度和亮度变化引起的持续瞳孔收缩。例如，降低L-和M-视锥细胞以及视杆细胞和黑视蛋白光感受器对比度的刺激调制产生了持续收缩，而不是预测的扩张。尽管持续反应是单向的，但我们证实它们至少部分是由L-和M-视锥细胞对手相互作用介导的。鉴于瞳孔改善视觉清晰度的功能，我们讨论了持续单向颜色反应的影响。
