The Deceptively Simple N170 Reflects Network Information Processing Mechanisms Involving Visual Feature Coding and Transfer Across Hemispheres.
The Deceptively Simple N170 Reflects Network Information Processing Mechanisms Involving Visual Feature Coding and Transfer Across Hemispheres.
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DOI：
10.1093/cercor/bhw196
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发表时间：
2016-10-01
期刊：
影响因子：
--
通讯作者：
Schyns PG
中科院分区：
文献类型：
--
作者：
Ince RAA;Jaworska K;Gross J;Panzeri S;van Rijsbergen NJ;Rousselet GA;Schyns PG
理解视觉认知的关键是确定大脑反应“在哪里”、“何时”和“如何”反映调节分类行为的特定视觉特征（即“什么”）的处理。 N170 是最早对面部做出反应的事件相关电位 (ERP)。在这里，我们证明有必要进行范式转变，将 N170 解释为跨半球动态编码和传输面部特征的信息处理网络的产物，而不是局部刺激驱动的事件。逆相关方法与信息论分析相结合表明，眼睛的可见度会影响人脸检测行为。 N170 最初反映了传感器对侧行为相关眼睛的编码，然后是来自另一个半球的另一只眼睛的因果通信。这些发现表明，看似简单的 N170 ERP 隐藏了复杂的网络信息处理机制，涉及初始编码和随后的视觉特征跨半球传输。
A key to understanding visual cognition is to determine “where”, “when”, and “how” brain responses reflect the processing of the specific visual features that modulate categorization behavior—the “what”. The N170 is the earliest Event-Related Potential (ERP) that preferentially responds to faces. Here, we demonstrate that a paradigmatic shift is necessary to interpret the N170 as the product of an information processing network that dynamically codes and transfers face features across hemispheres, rather than as a local stimulus-driven event. Reverse-correlation methods coupled with information-theoretic analyses revealed that visibility of the eyes influences face detection behavior. The N170 initially reflects coding of the behaviorally relevant eye contralateral to the sensor, followed by a causal communication of the other eye from the other hemisphere. These findings demonstrate that the deceptively simple N170 ERP hides a complex network information processing mechanism involving initial coding and subsequent cross-hemispheric transfer of visual features.
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