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Visual information processing on symmetric and asymmetric objects in human brain—an evoked potential study

机译:对人类大脑中对称和不对称物体的视觉信息处理-一项潜在的研究

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Electrophysiological studies on brain evoked potential (BEP) have shown that the discrimination between object categories starts in the occipito-temporal cortex, while the relatively simple characteristics of objects are differentiated in the visual cortex. However, where and when the discrimination of symmetrical level in the visual general object starts are questions whose answers are largely unclear. This study is aimed at investigating the BEP patterns in humans when perceiving symmetry-variated complex object images. Using 128-channel EEG scalp electrodes, the BEP responses from seven healthy subjects to the gray-scaled images of five different objects with different levels of horizontal and vertical symmetry were recorded. The results showed that the BEPs recorded from visual cortex and centro-parietal sites at around 100 ms and 300 ms, respectively, after stimulus onset were not significantly affected. The correlation between BEP and symmetry level seemed to be revealed by the latency differences at occipito-temporal sites around 170 ms after stimulus onset.
机译:对脑诱发电位(BEP)的电生理研究表明,对象类别之间的区分始于枕颞皮层,而相对简单的对象特征在视觉皮层中有所区别。但是,视觉通用对象中的对称水平的判别何时何地开始是问题,其答案很大程度上不清楚。这项研究旨在调查人类感知对称变化的复杂物体图像时的BEP模式。使用128通道脑电图仪头皮电极,记录了来自七个健康受试者的BEP对五个水平和垂直对称程度不同的五个不同对象的灰度图像的响应。结果表明,刺激发作后,分别在视觉皮层和中心顶叶部位分别在100 ms和300 ms处记录的BEP没有受到明显影响。 BEP与对称性水平之间的相关性似乎是由刺激发作后170 ms左右枕骨颞位点的潜伏期差异揭示的。

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