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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Relative blindsight in normal observers and the neural correlate of visual consciousness
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Relative blindsight in normal observers and the neural correlate of visual consciousness

机译：正常观察者的相对视力与视觉意识的神经相关

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摘要

By using a paradigm based on metacontrast masking, we created experimental conditions in which the subjective report of consciousness differs but the objectively measured ability to discriminate visual targets does not. This approach allowed us to study the neural correlate of consciousness while having performance levels carefully matched in healthy human subjects. A comparison of the neural activity associated with these conditions as measured by functional MRI showed that conscious perception is associated with spatially specific activity in the mid-dorsolateral prefrontal cortex (area 46). Further analysis confirms that this activation is not only free from any performance confound, but is also not driven by differences in the timing of the physical stimuli. Our results suggest that the prefrontal cortex is important for the essentially subjective aspects of conscious perception.
机译：通过使用基于元对比掩盖的范例，我们创建了实验条件，在该条件下，主观的意识报告有所不同，但是客观测量出的分辨视觉目标的能力却没有。这种方法使我们能够研究意识的神经相关性，同时在健康的人类受试者中使表现水平仔细匹配。通过功能性MRI对与这些疾病相关的神经活动进行比较，结果表明，意识感知与中外侧前额叶皮层（区域46）的空间特定活动相关。进一步的分析证实，这种激活不仅没有任何性能上的混淆，而且也不受物理刺激时机差异的驱动。我们的结果表明前额叶皮层对于意识感知的基本主观方面很重要。

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