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首页> 外文期刊>Neuron >Population responses to contour integration: Early encoding of discrete elements and late perceptual grouping
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Population responses to contour integration: Early encoding of discrete elements and late perceptual grouping

机译：人口对轮廓整合的反应：离散元素的早期编码和后期感知分组

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摘要

The neuronal mechanisms underlying perceptual grouping of discrete, similarly oriented elements are not well understood. To investigate this, we measured neural population responses using voltage-sensitive dye imaging in V1 of monkeys trained on a contour-detection task. By mapping the contour and background elements onto V1, we could study their neural processing. Population response early in time showed activation patches corresponding to the contour/background individual elements. However, late increased activity in the contour elements, along with suppressed activity in the background elements, enabled us to visualize in single trials a salient continuous contour "popping out" from a suppressed background. This modulated activity in the contour and in background extended beyond the cortical representation of individual contour or background elements. Finally, the late modulation was correlated with behavioral performance of contour saliency and the monkeys' perceptual report. Thus, opposing responses in the contour and background may underlie perceptual grouping in V1.
机译：对离散的，取向相似的元素进行感知分组的神经机制尚不十分清楚。为了调查这一点，我们在轮廓检测任务训练的猴子的V1中使用电压敏感染料成像测量了神经种群反应。通过将轮廓和背景元素映射到V1，我们可以研究它们的神经处理。早期的种群响应显示出对应于轮廓/背景个体元素的激活斑块。但是，轮廓元素中后期活动的增加以及背景元素中活动的抑制，使我们能够在单个试验中可视化从受抑制背景中突出的连续轮廓“弹出”。轮廓和背景中的这种调制的活动超出了单个轮廓或背景元素的皮层表示。最后，后期调制与轮廓显着的行为表现和猴子的知觉报告相关。因此，轮廓和背景中相对的响应可能是V1中感知分组的基础。

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