Contour saliency in primary visual cortex
Contour saliency in primary visual cortex
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DOI：
10.1016/j.neuron.2006.04.035
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发表时间：
2006-06-15
期刊：
影响因子：
16.2
通讯作者：
Gilbert, Charles D.
中科院分区：
文献类型：
--
作者：
Li, Wu;Piëch, Valentin;Gilbert, Charles D.
轮廓整合是物体识别的一个重要中间阶段，其中属于物体边界的线段从复杂背景中被感知地连接和分割。在初级视皮层（V1）观察到的上下文影响表明V1参与轮廓整合。在这里，我们提供了直接的证据表明，在猴子执行轮廓检测任务，V1神经元的反应和轮廓的感知显着性之间有密切的相关性。受试者操作特征分析表明，单个神经元的反应编码的存在或不存在的轮廓可靠的动物的行为反应。我们还表明，相同的视觉轮廓引起显着较弱的神经元反应时，他们没有检测到的检测任务，或当他们无人看管。我们的研究结果表明，在V1的上下文相互作用的轮廓整合和显着性发挥了关键作用。
Contour integration is an important intermediate stage of object recognition, in which line segments belonging to an object boundary are perceptually linked and segmented from complex backgrounds. Contextual influences observed in primary visual cortex (V1) suggest the involvement of V1 in contour integration. Here, we provide direct evidence that, in monkeys performing a contour detection task, there was a close correlation between the responses of V1 neurons and the perceptual saliency of contours. Receiver operating characteristic analysis showed that single neuronal responses encode the presence or absence of a contour as reliably as the animal's behavioral responses. We also show that the same visual contours elicited significantly weaker neuronal responses when they were not detected in the detection task, or when they were unattended. Our results demonstrate that contextual interactions in V1 play a pivotal role in contour integration and saliency.