Symmetry activates extrastriate visual cortex in human and nonhuman primates.
Symmetry activates extrastriate visual cortex in human and nonhuman primates.
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DOI：
10.1073/pnas.0500319102
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发表时间：
2005-02
影响因子：
11.1
通讯作者：
Y. Sasaki;W. Vanduffel;T. Knutsen;C. Tyler;R. Tootell
中科院分区：
文献类型：
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作者：
Y. Sasaki;W. Vanduffel;T. Knutsen;C. Tyler;R. Tootell
人类经常在他们的环境中创造和欣赏视觉对称性，而潜在的大脑机制一直是人们越来越感兴趣的话题。在这里，对称与随机点刺激在人类视觉皮层的高阶区域（特别是V3A，V4，V7和LO区域）产生了强大的功能性MRI（fMRI）活动，但在大脑的其他地方几乎没有活动。这种fMRI反应在有和没有注意力控制的情况下都被发现。此外，它与对称性的心理物理感知高度相关。通过使用基于线和点的刺激，发现了类似的对称性反应，并发现在广泛的刺激大小和几何配置。利用灵敏度较高的fMRI技术，在猕猴视皮层的类似区域发现了较弱的对称性反应。这一证据表明，视觉对称性在人类大脑中得到了特别的增强，但潜在的神经机制在非人类灵长类动物中可能是可以解决的。
Humans often create and appreciate visual symmetry in their environment, and the underlying brain mechanisms have been a topic of increasing interest. Here, symmetric versus random dot stimuli produced robust functional MRI (fMRI) activity in higher-order regions of human visual cortex (especially areas V3A, V4, V7, and LO) but little activity elsewhere in brain. This fMRI response was found both with and without attention controls. Moreover, it was highly correlated with the psychophysical perception of symmetry. Similar symmetry responses were found by using line-based and dot stimuli and were found at a wide range of stimulus sizes and geometric configurations. Weaker symmetry responses were found in analogous regions of macaque visual cortex by using fMRI techniques with higher sensitivity. This evidence suggests that visual symmetry is specifically enhanced in the human brain, but that the underlying neural mechanisms may nevertheless be resolvable in nonhuman primates.