Factors governing the speed of color adaptation in foveal versus peripheral vision
Factors governing the speed of color adaptation in foveal versus peripheral vision
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DOI：
10.1364/josaa.31.00a220
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发表时间：
2014-04-01
影响因子：
1.9
通讯作者：
Zaidi, Qasim
中科院分区：
文献类型：
--
作者：
Bachy, Romain;Zaidi, Qasim
Troxler表明，固定刺激在周边比在中心凹视觉中消退得更快。我们使用了一个随时间变化的程序，以表明周边适应是更快，更明显的比中央凹适应的三个主要的颜色调制，隔离不同类别的视网膜神经节细胞。然后，我们测试的假设，即固定的眼球运动控制的幅度和速度的适应，通过模拟他们与间歇性闪光，并削弱其影响与模糊的边界。心理物理和电生理结果证实了眼动为基础的假设。通过比较不同类别的神经节细胞的效果，我们发现，眼球运动的影响不仅是通过偏心率的感受野的大小增加来介导的，而且还通过不同神经节细胞对刺激的尖锐边界和瞬态变化的敏感性来介导的。最后，使用相同的范例与视网膜神经节细胞，我们表明，适应参数不为3类神经节细胞的偏心率从2度到12度，在没有眼球运动。(C)2014年美国光学学会
Troxler showed that fixated stimuli fade faster in peripheral than in foveal vision. We used a time-varying procedure, to show that peripheral adaptation is faster and more pronounced than foveal adaptation for the three cardinal color modulations that isolate different classes of retinal ganglion cells. We then tested the hypothesis that fixational eye movements control the magnitude and speed of adaptation, by simulating them with intermittent flashes, and attenuating their effects with blurred borders. Psychophysical and electrophysiological results confirmed the eye movement-based hypothesis. By comparing effects across classes of ganglion cells, we found that the effects of eye movements are mediated not only by the increase in size of receptive fields with eccentricity, but also by the sensitivity of different ganglion cells to sharp borders and transient changes in the stimulus. Finally, using the same paradigm with retinal ganglion cells, we show that adaptation parameters do not vary for the three classes of ganglion cells for eccentricities from 2 degrees to 12 degrees, in the absence of eye movement. (C) 2014 Optical Society of America