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Binocularly-driven competing neural responses and the perceptual resolution of color.
Journal of Vision ( IF 1.8 ) Pub Date : 2021-9-21 , DOI: 10.1167/jov.21.10.15
Bobicheng Zhang 1 , Emily Slezak 1, 2 , Wei Wang 1, 2 , Steven K Shevell 1, 2, 3
Affiliation  

Competing rivalrous neural representations can be resolved at several levels of the visual system. Sustained percepts during interocular-switch rivalry (ISR), in which rivalrous left- and right-eye stimuli swap between eyes several times a second, often are attributed to competing binocularly driven neural representations of each rivalrous stimulus. An alternative view posits monocular neural competition together with a switch in eye dominance at the moment of each stimulus swap between eyes. Here, a range of experimental conditions was tested that would change the colors seen if mediated by eye dominance but not if by competition between binocularly driven responses. Observers viewed multiple chromatically rivalrous discs in various temporal and spatial patterns, and reported when all discs in view appeared the same color. Unlike typical ISR paradigms that swap the complete stimulus in each eye, some of the rivalrous discs were swapped at a different time, or faster frequency, than other discs. Monocular dominance of one eye at a time implies that all discs will rarely be seen as identical in color when some discs swap at a different frequency than others. On the other hand, competing binocularly driven neural responses are not affected by asynchronous swap timing among the individual discs. Results for every observer are in accord with competing responses at the level of binocularly driven, chromatically tuned neurons. Although an account based on eye dominance can be constructed using many small retinotopic zones that have independent timing for the moment of switching the dominant eye, competing binocularly driven responses are a more parsimonious explanation.

中文翻译:

双目驱动的竞争神经反应和颜色的感知分辨率。

相互竞争的神经表征可以在视觉系统的几个层次上解决。眼间切换竞争 (ISR) 期间的持续感知,其中竞争性左眼和右眼刺激每秒在眼睛之间交换几次,通常归因于每个竞争性刺激的竞争性双眼驱动神经表征。另一种观点假设单眼神经竞争以及在眼睛之间每个刺激交换的时刻眼睛优势的转换。在这里,测试了一系列实验条件,如果由眼睛优势介导,但不会改变双眼驱动反应之间的竞争,这些条件会改变所看到的颜色。观察者在不同的时间和空间模式中观察了多个颜色竞争的圆盘,并报告了当视野中的所有圆盘出现相同颜色时。与在每只眼睛中交换完整刺激的典型 ISR 范例不同,一些竞争性视盘的交换时间或频率与其他视盘不同。一次一只眼睛的单眼优势意味着当某些视盘以与其他视盘不同的频率交换时,很少会看到所有视盘的颜色相同。另一方面,双目驱动的竞争性神经反应不受单个圆盘之间异步交换时间的影响。每个观察者的结果都与双眼驱动、色调神经元水平上的竞争反应一致。虽然可以使用许多小的视网膜区域构建基于眼睛优势的帐户,这些区域在切换优势眼的时刻具有独立的时间,但竞争性的双眼驱动反应是更简洁的解释。
更新日期:2021-09-21
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