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首页> 外文期刊>Journal of Neurophysiology >Integration of texture and disparity cues to surface slant in dorsal visual cortex
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Integration of texture and disparity cues to surface slant in dorsal visual cortex

机译：背视皮层表面倾斜的纹理和视差提示的整合

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Reliable estimation of three-dimensional (3D) surface orientation is critical for recognizing and interacting with complex 3D objects in our environment. Human observers maximize the reliability of their estimates of surface slant by integrating multiple depth cues. Texture and binocular disparity are two such cues, but they are qualitatively very different. Existing evidence suggests that representations of surface tilt from each of these cues coincide at the single-neuron level in higher cortical areas. However, the cortical circuits responsible for 1) integration of such qualitatively distinct cues and 2) encoding the slant component of surface orientation have not been assessed. We tested for cortical responses related to slanted plane stimuli that were defined independently by texture, disparity, and combinations of these two cues. We analyzed the discriminability of functional MRI responses to two slant angles using multivariate pattern classification. Responses in visual area V3B/KO to stimuli containing congruent cues were more discriminable than those elicited by single cues, in line with predictions based on the fusion of slant estimates from component cues. This improvement was specific to congruent combinations of cues: incongruent cues yielded lower decoding accuracies, which suggests the robust use of individual cues in cases of large cue conflicts. These data suggest that area V3B/KO is intricately involved in the integration of qualitatively dissimilar depth cues.
机译：可靠地估计三维（3D）表面方向对于识别环境中的复杂3D对象并与之交互至关重要。人类的观察者通过整合多个深度线索来最大化其表面倾斜估计的可靠性。质地和双眼视差是两个这样的提示，但是它们在质量上有很大的不同。现有证据表明，来自这些线索的每个表面倾斜的表示在较高皮层区域的单神经元水平上是重合的。但是，尚未评估负责1）这种质量上不同的线索的整合和2）编码表面取向的倾斜分量的皮质回路。我们测试了与倾斜平面刺激相关的皮质反应，这些反应由纹理，视差和这两种提示的组合独立定义。我们使用多元模式分类分析了功能性MRI对两个倾斜角度的可分辨性。在视觉区域V3B / KO中，对包含一致线索的刺激的响应比由单个线索引起的响应更具可分辨性，这与基于基于组分线索的偏向估计值融合的预测相符。此改进特定于线索的全等组合：不一致的线索产生的解码精度较低，这表明在出现较大的线索冲突的情况下可以可靠地使用单个线索。这些数据表明，区域V3B / KO复杂地涉及定性不同的深度线索的集成。

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