Joint-encoding of motion and depth by visual cortical neurons: neural basis of the Pulfrich effect
Joint-encoding of motion and depth by visual cortical neurons: neural basis of the Pulfrich effect
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DOI：
10.1038/87462
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发表时间：
2001-05-01
影响因子：
25
通讯作者：
Freeman, RD
中科院分区：
文献类型：
--
作者：
Anzai, A;Ohzawa, I;Freeman, RD
运动和立体深度是视觉场景结构分析的基本参数。因为它们是由物体位置的差异定义的，无论是随着时间的推移还是在眼睛上，一个共同的神经机制可以用于编码这些属性。为了验证这一观点，我们分析了猫纹状皮层中双眼复合细胞对各种眼内和眼间空间和时间变化刺激的反应。我们发现，大多数神经元表现出时空导向的反应轮廓在单眼和双眼域。这表明这些神经元联合编码运动和深度，并解释了Pulfrich效应等现象。我们还发现，运动和深度的神经元调谐之间的关系符合使用运动视差作为深度线索的预测。这些结果表明，联合编码的运动和深度在早期皮质阶段。
Motion and stereoscopic depth are fundamental parameters of the structural analysis of visual scenes. Because they are defined by a difference in object position, either over time or across the eyes, a common neural machinery may be used for encoding these attributes. To examine this idea, we analyzed responses of binocular complex cells in the cat striate cortex to stimuli of various intra- and interocular spatial and temporal shifts. We found that most neurons exhibit space-time-oriented response profiles in both monocular and binocular domains. This indicates that these neurons encode motion and depth jointly, and it explains phenomena such as the Pulfrich effect. We also found that the relationship between neuronal tuning of motion and depth conforms to that predicted by the use of motion parallax as a depth cue. These results demonstrate a joint-encoding of motion and depth at an early cortical stage.