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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Nonstimulated early visual areas carry information about surrounding context
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Nonstimulated early visual areas carry information about surrounding context

机译：不受刺激的早期视觉区域携带有关周围环境的信息

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摘要

Even within the early sensory areas, the majority of the input to any given cortical neuron comes from other cortical neurons. To extend our knowledge of the contextual information that is transmitted by such lateral and feedback connections, we investigated how visually nonstimulated regions in primary visual cortex (V1) and visual area V2 are influenced by the surrounding context. We used functional magnetic resonance imaging (fMRI) and pattern-classification methods to show that the cortical representation of a nonstimulated quarter-field carries information that can discriminate the surrounding visual context. We show further that the activity patterns in these regions are significantly related to those observed with feed-forward stimulation and that these effects aje driven primarily by V1. These results thus demonstrate that visual context strongly influences early visual areas even in the absence of differential feed-forward thalamic stimulation.
机译：即使在早期的感觉区域内，任何给定皮质神经元的大部分输入也来自其他皮质神经元。为了扩展我们对通过此类横向和反馈连接传输的上下文信息的了解，我们研究了主视觉皮层（V1）和视觉区域V2中的视觉非刺激区域如何受到周围环境的影响。我们使用功能磁共振成像（fMRI）和模式分类方法来显示未刺激的四分之一视场的皮质表示所携带的信息可以区分周围的视觉环境。我们进一步表明，这些区域的活动模式与前馈刺激所观察到的活动模式显着相关，并且这些影响主要由V1驱动。因此，这些结果表明，即使没有差异性前馈丘脑刺激，视觉环境也会强烈影响早期视觉区域。

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  • 作者

    Fraser W. Smith; Lars Muckli;

  • 作者单位

    Centre for Cognitive Neuroimaging (CCNi), Institute of Neuroscience & Psychology, College of Medical, Veterinary & Life Sciences University of Glasgow, Glasgow G12 8QB, United Kingdom,School of Psychology, College of Science & Engineering, University of Glasgow, Glasgow G12 8QB, United Kingdom,Centre for Brain and Mind and Department of Psychology, University of Western Ontario, London, ON, Canada N6G 1G9;

    Centre for Cognitive Neuroimaging (CCNi), Institute of Neuroscience & Psychology, College of Medical, Veterinary & Life Sciences University of Glasgow, Glasgow G12 8QB, United Kingdom,School of Psychology, College of Science & Engineering, University of Glasgow, Glasgow G12 8QB, United Kingdom;

  • 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

    linear classifier; natural visual scenes; cortical feedback; lateral interaction;

    机译：线性分类器自然的视觉场景;皮层反馈横向相互作用;

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