Face processing and early event-related potentials: replications and novel findings.
Face processing and early event-related potentials: replications and novel findings.
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DOI：
10.3389/fnhum.2023.1268972
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发表时间：
2023
影响因子：
2.9
通讯作者：
Brunet, Nicolas M.
中科院分区：
文献类型：
--
作者：
Brunet, Nicolas M.
本研究探讨了早期事件相关电位（ERP）对面部刺激的敏感性，研究了各种面部特征，旨在揭示潜在的神经机制。两个实验，每个涉及15名本科生，利用多维刺激集，包括种族，性别，年龄，情绪表达，面具，和刺激方向。研究结果突出了N170和P200振幅和特定属性的潜伏期的显著调制，复制了先前的研究并揭示了新的见解。值得注意的是，与年龄相关的面部特征变化，面部倒置和面具的存在显着影响神经反应。提出了几种推测性的解释来阐明这些结果：首先，研究结果支持了这样一种观点，即面部倒置观察到的N170振幅增加与对象敏感神经元的激活密切相关。当面具（有效对象）添加到面部时，注意到类似的幅度增加，这进一步得到了支持。其次，当用面罩反转面部图像时，没有额外的幅度增加表明神经群体可能已经达到饱和点，限制了进一步的增强。第三，研究表明，面部倒置引起的N170潜伏期缺陷在随后的ERP成分P200中更为明显，这表明面部倒置可能会影响面部处理的多个阶段。最后，P200振幅的显着增加，通常与脸的典型性，在这项研究中蒙面的脸与以前的研究表明，提高P200振幅的混乱的脸。这表明，模糊的脸可能会被处理为典型的，潜在地表示在面部处理的默认状态。
This research explores early Event-Related Potentials (ERPs) sensitivity to facial stimuli, investigating various facial features aimed to unveil underlying neural mechanisms. Two experiments, each involving 15 undergraduate students, utilized a multidimensional stimulus set incorporating race, gender, age, emotional expression, face masks, and stimulus orientation. Findings highlight significant modulations in N170 and P200 amplitudes and latencies for specific attributes, replicating prior research and revealing novel insights. Notably, age-related facial feature variations, facial inversion, and the presence of face masks significantly impact neural responses. Several speculative explanations are proposed to elucidate these results: First, the findings lend support to the idea that the increased N170 amplitude observed with facial inversion is closely tied to the activation of object-sensitive neurons. This is further bolstered by a similar amplitude increase noted when masks (effective objects) are added to faces. Second, the absence of an additional amplitude increase, when inverting face images with face masks suggests that neural populations may have reached a saturation point, limiting further enhancement. Third, the study reveals that the latency deficit in N170 induced by facial inversion is even more pronounced in the subsequent ERP component, the P200, indicating that face inversion may impact multiple stages of face processing. Lastly, the significant increase in P200 amplitude, typically associated with face typicality, for masked faces in this study aligns with previous research that demonstrated elevated P200 amplitudes for scrambled faces. This suggests that obscured faces may be processed as typical, potentially representing a default state in face processing.
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