Kaffes Maximilian, Rabe Lea, Rudolph Armin, Rentzsch Johannes, Neuhaus Andres H, Hofmann-Shen Christina
Department of Psychiatry, Charité University Medicine Berlin, Germany.
Department of Neurology, Charité University Medicine Berlin, Germany.
Curr Res Neurobiol. 2023 Feb 10;4:100078. doi: 10.1016/j.crneur.2023.100078. eCollection 2023.
Various aspects of cortical face processing have been studied by assessing event related potentials (ERP). It has been described in the literature that mismatch negativity (MMN), a well-studied ERP, is not only modulated by sensory features but also emotional valence. However, the exact impact of emotion on the temporo-spatial profile of visual MMN during face processing remains inconsistent. By employing a sequential oddball paradigm using both neutral and emotional deviants, we were able to differentiate two distinct vMMN subcomponents. While an early subcomponent at 150-250 ms is elicited by emotional salient facial stimuli, the later subcomponent at 250-400 ms seems to reflect the detection of regularity violations in facial recognition per se, unaffected by emotional salience. Our results suggest that emotional valence is encoded in vMMN signal strength at an early stage of facial processing. Furthermore, we assume that of facial processing consists of temporo-spatially distinct, partially overlapping levels concerning different facial aspects.
通过评估事件相关电位（ERP），人们对皮质面部处理的各个方面进行了研究。文献中已有描述，研究充分的ERP成分失匹配负波（MMN）不仅受感觉特征调制，还受情感效价影响。然而，在面部处理过程中，情绪对视觉MMN的时空特征的确切影响仍不一致。通过采用使用中性和情感偏差刺激的序列oddball范式，我们能够区分两个不同的视觉MMN子成分。虽然150 - 250毫秒的早期子成分由情感突出的面部刺激引发，但250 - 400毫秒的后期子成分似乎反映了面部识别本身规则违反的检测，不受情感突出性的影响。我们的结果表明，情感效价在面部处理的早期阶段通过视觉MMN信号强度进行编码。此外，我们假设面部处理在时间和空间上由关于不同面部方面的不同、部分重叠的层次组成。
