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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A backward progression of attentional effects in the ventral stream
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A backward progression of attentional effects in the ventral stream

机译：腹侧注意效应向后发展

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摘要

The visual processing of behaviorally relevant stimuli is enhanced through top-down attentional feedback. One possibility is that feedback targets early visual areas first and the attentional enhancement builds up at progressively later stages of the visual hierarchy. An alternative possibility is that the feedback targets the higher-order areas first and the attentional effects are communicated "backward" to early visual areas. Here, we compared the magnitude and latency of attentional enhancement of firing rates in V1, V2, and V4 in the same animals performing the same task. We found a reverse order of attentional effects, such that attentional enhancement was larger and earlier in V4 and smaller and later in V1, with intermediate results in V2. These results suggest that attentional mechanisms operate via feedback from higher-order areas to lower-order ones.
机译：通过自上而下的注意反馈，可以增强行为相关刺激的视觉处理。一种可能性是，反馈首先针对早期视觉区域，而注意力增强则在视觉层次结构的逐渐发展的后期逐步建立。另一种可能性是，反馈首先针对高阶区域，而注意效果则“向后”传达给早期视觉区域。在这里，我们比较了在执行相同任务的相同动物中，V1，V2和V4的注意力激发速度提高的幅度和潜伏期。我们发现注意效果的顺序相反，因此注意增强在V4中更大，更早，在V1中更小，之后，在V2中居中。这些结果表明，注意力机制通过从高阶区域到低阶区域的反馈进行操作。

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  • 作者

    Elizabeth A. Buffalo; Pascal Fries; Rogier Landmark; Hualou Liang; Robert Desimone;

  • 作者单位

    Yerkes National Primate Research Center and Department of Neurology, Emory University School of Medicine, Atlanta, GA 30329;

    Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, 6525 EN Nijmegen, The Netherlands Ernst Strungmann Institute in Cooporation with Max Planck Society, 60528 Frankfurt, Germany;

    McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA 02139;

    School of Biomedical Engineering, Drexel University, Philadelphia, PA, 19104;

    McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA 02139;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    attention; Macaque; vision; feedback;

    机译：注意;猕猴;视力;反馈;

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