Temporal encoding of spatial information during active visual fixation.
Temporal encoding of spatial information during active visual fixation.
复制标题
主动视觉固定过程中空间信息的时间编码。
DOI：
10.1016/j.cub.2012.01.050
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发表时间：
2012-03-20
期刊：
影响因子：
9.2
通讯作者：
Rucci, Michele
中科院分区：
文献类型：
--
作者：
Kuang, Xutao;Poletti, Martina;Victor, Jonathan D.;Rucci, Michele
人类和其他物种持续进行微观眼球运动，即使是在关注一个点时。这些运动，包括微观漂移和微扫视，是在眼神经系统的控制下，引起整个视觉系统的强烈反应，并已被认为是服务于重要的功能。这些注视眼球运动对视觉信息的获取和神经处理的影响仍然是未知的。在这里，我们表明，在观看自然场景，微观眼球运动进行了一个关键的信息处理步骤：他们删除可预测的相关性，在自然场景中均衡的空间功率的视网膜图像的频率范围内的神经节细胞的峰值灵敏度。这种转换，这已被归因于中心-周围感受野组织，发生在任何神经处理之前，并揭示了自然图像的统计数据和正常眼球运动之间的匹配形式。我们进一步表明，显微眼球运动和视网膜感受野组织的综合效果是将空间亮度不连续性转换为同步发射事件，从而开始边缘提取的过程。总之，我们的研究结果表明，微观眼球运动是基本的两个目标的早期视觉处理-冗余减少和特征提取-因此，神经表征本质上是从第一个处理阶段的感觉运动。
Humans and other species continually perform microscopic eye movements, even when attending to a single point. These movements, which include microscopic drifts and microsaccades, are under control of the oculomotor system, elicit strong responses throughout the visual system, and have been thought to serve important functions. The influence of these fixational eye movements on the acquisition and neural processing of visual information remains unknown. Here, we show that during viewing of natural scenes, microscopic eye movements carry out a crucial information-processing step: they remove predictable correlations in natural scenes by equalizing the spatial power of the retinal image within the frequency range of ganglion cells' peak sensitivity. This transformation, which had been attributed to center-surround receptive field organization, occurs prior to any neural processing, and reveals a form of matching between the statistics of natural images and those of normal eye movements. We further show that the combined effect of microscopic eye movements and retinal receptive field organization is to convert spatial luminance discontinuities into synchronous firing events, thus beginning the process of edge extraction. In sum, our results show that microscopic eye movements are fundamental to two goals of early visual processing —redundancy reduction and feature extraction— and, thus, that neural representations are intrinsically sensory-motor from the very first processing stages.
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影响因子：
5.4
作者：
ATTNEAVE, F
通讯作者：
ATTNEAVE, F
DOI：
10.1126/science.1166112
发表时间：
2009-02-13
期刊：
Science (New York, N.Y.)
影响因子：
--
作者：
Hafed ZM;Goffart L;Krauzlis RJ
通讯作者：
Krauzlis RJ
影响因子：
1.9
作者：
Snodderly, DM;Kagan, I;Gur, M
通讯作者：
Gur, M
DOI：
10.1523/jneurosci.4412-08.2009
发表时间：
2009-05-06
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Herrington TM;Masse NY;Hachmeh KJ;Smith JE;Assad JA;Cook EP
通讯作者：
Cook EP
影响因子：
25
作者：
Ko, Hee-kyoung;Poletti, Martina;Rucci, Michele
通讯作者：
Rucci, Michele