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The Neural Basis for Visual Selective Attention in Young Infants: A Computational Account

机译:幼儿视觉选择性注意的神经基础:一种计算方法

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摘要

Recent work by Amso and Johnson (Developmental Psychology, 42(6), 1236-1245, 2006) implicates the role of visual selective attention in the development of perceptual completion during early infancy. In the current article, we extend this finding by simulating the performance of 3-month-old infants on a visual search task, using a multi-channel, image-filtering model of early visual processing. Model parameters were systematically varied to simulate developmental change in three neural components of visual selective attention: degree of oculomotor noise, growth of horizontal connections in visual cortex, and duration of recurrent processing in parietal cortex. While two of the three components—horizontal connections and recurrent parietal processing—are each able to account for the visual search performance of 3-month-olds, recurrent parietal processing also suggests a coherent pattern of developmental change in visual selective attention during early infancy. We conclude by highlighting plausible neural mechanisms for modulating recurrent parietal activity, including the development of feedback from prefrontal cortex.
机译:Amso和Johnson的最新工作(Developmental Psychology,42(6),1236-1245,2006)暗示了视觉选择性注意在婴儿早期知觉完成发展中的作用。在当前文章中,我们使用早期视觉处理的多通道图像过滤模型,通过模拟3个月大婴儿在视觉搜索任务上的表现来扩展这一发现。系统地改变模型参数以模拟视觉选择性注意的三个神经成分的发育变化:动眼噪声程度,视觉皮层中水平连接的增长以及顶叶皮层反复加工的持续时间。虽然三个组成部分中的两个(水平连接和重复顶叶处理)都能够说明3个月大的婴儿的视觉搜索性能,但重复顶叶处理也表明婴儿早期视觉选择性注意的发展变化具有连贯性。我们通过强调合理的神经机制来调节复发性顶叶活动,包括前额叶皮层反馈的发展,从而得出结论。

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