An objective neural signature of rapid perspective taking.
An objective neural signature of rapid perspective taking.
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DOI：
10.1093/scan/nsx135
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发表时间：
2018-01-01
影响因子：
4.2
通讯作者：
Samson D
中科院分区：
文献类型：
--
作者：
Beck AA;Rossion B;Samson D
频率标记方法通常局限于研究低水平的感觉过程，并且总是在枕区发现相关的激活。在这里，我们第一次用它来研究高层次的社会认知功能，即处理别人正在看的东西，这被称为一级视觉透视（VPT）。16名参与者以2.5赫兹的频率交替观看描绘房间里一个人和一个物体的视觉场景，同时记录大脑的电生理活动。人的方向和物体的位置在每次刺激下都会改变，但房间里的人总是面对着物体，除了每隔第五次刺激。我们发现脑电图（EEG）频谱的反应正好与人看不到物体的场景呈现的频率相对应，即0.5 Hz。2.5 Hz的刺激率反应主要集中在典型的枕部内侧部位，而0.5 Hz的刺激率反应主要集中在顶叶中央区域。除了强大的群体效应，这些反应对大多数个体参与者来说是显著的和可量化的。总的来说，这些观察结果揭示了1-VPT水平表征的清晰测量，突出了脑电图频率标记在捕捉大脑高级社会认知功能方面的潜力。
The frequency-tagging approach has generally been confined to study low-level sensory processes and always found related activation over the occipital region. Here for the first time, we investigated with it, high-level socio-cognitive functions, i.e. the processing of what other people are looking at which is referred to as level 1 visual perspective taking (VPT). Sixteen participants were presented with visual scenes alternating at 2.5 Hz which were depicting a person and an object in a room, while recording electrophysiological brain activity. The person orientation and object position changed at every stimulus but the person in the room always faced the object, except on every fifth stimulus. We found responses in the electroencephalography (EEG) spectrum exactly at the frequency corresponding to the presentation of the scenes where the person could not see the object, i.e. 0.5 Hz. While the 2.5 Hz stimulation rate response focused on typical medial occipital sites, the specific 0.5 Hz response was found mainly over a centro-parietal region. Besides a robust group effect, these responses were significant and quantifiable for most individual participants. Overall, these observations reveal a clear measure of level 1-VPT representation, highlighting the potential of EEG frequency-tagging to capture high-level socio-cognitive functions in the brain.
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