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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Differential brain activity states during the perception and nonperception of illusory motion as revealed by magnetoencephalography
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Differential brain activity states during the perception and nonperception of illusory motion as revealed by magnetoencephalography

机译：脑磁图显示的在幻觉运动的感知和非感知过程中大脑活动状态的差异

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摘要

We studied visual perception using an annular random-dot motion stimulus called the racetrack. We recorded neural activity using magnetoencephalography while subjects viewed variants of this stimulus that contained no inherent motion or various degrees of embedded motion. Subjects reported seeing rotary motion during viewing of all stimuli. We found that, in the absence of any motion signals, patterns of brain activity differed between states of motion perception and nonperception. Furthermore, when subjects perceived motion, activity states within the brain did not differ across stimuli of different amounts of embedded motion. In contrast, we found that during periods of nonperception brain-activity states varied with the amount of motion signal embedded in the stimulus. Taken together, these results suggest that during perception the brain may lock into a stable state in which lower-level signals are suppressed.
机译：我们使用称为跑道的环形随机点运动刺激研究了视觉感知。我们使用脑磁图记录了神经活动，而受试者观察了这种刺激的变体，其中没有固有运动或各种程度的嵌入运动。受试者报告在观看所有刺激时看到旋转运动。我们发现，在没有任何运动信号的情况下，运动知觉和非知觉状态之间的大脑活动模式是不同的。此外，当受试者感觉到运动时，大脑内部的活动状态在不同数量的嵌入运动的刺激下不会有所不同。相反，我们发现，在非知觉时期，大脑活动状态会随着嵌入刺激中的运动信号量而变化。综上所述，这些结果表明，在感知过程中，大脑可能会锁定在一个稳定状态，在该状态中较低级别的信号被抑制。

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  • 作者

    David A. Crowe; Arthur C. Leuthold; Apostolos P. Georgopoulos;

  • 作者单位

    Department of Biology, Augsburg College, Minneapolis, MN 55454,Brain Sciences Center, Veteran's Affairs Medical Center, Minneapolis, MN 55417,Center for Cognitive Sciences, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455;

    Brain Sciences Center, Veteran's Affairs Medical Center, Minneapolis, MN 55417,Department of Neuroscience, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455;

    Brain Sciences Center, Veteran's Affairs Medical Center, Minneapolis, MN 55417,Center for Cognitive Sciences, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455,Department of Neuroscience, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455;

  • 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

    racetrack illusion; visual motion perception;

    机译：赛道幻觉;视觉运动感知;

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