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Fearful face scrambles increase early visual sensory processing in the absence of face information
European Journal of Neuroscience ( IF 3.698 ) Pub Date : 2021-01-12 , DOI: 10.1111/ejn.15111
Sebastian Schindler 1, 2 , Maren‐Isabel Wolf 1 , Maximilian Bruchmann 1, 2 , Thomas Straube 1, 2
Affiliation  

Emotional facial expressions elicit distinct increased early electrophysiological responses. Many studies report even emotional modulations of very early sensory processing at about 80 and 100 ms after stimulus presentation, indexed by the P1. These early effects are often interpreted to index differential responses to biologically relevant expressions. Since specific spatial frequencies differ between fearful and neutral expressions, it has recently been suggested that these early modulations are substantially driven by such low‐level visual differences. However, it remains unclear whether similar P1 effects are also observed in experiments in which no recognizable face information is presented at all. This study investigated this question and explored also whether any effects depend on colour information and attentional conditions. Participants (N = 20) performed a continuous perceptual task of low or high difficultly and were presented with task‐irrelevant black/white and colour images of fearful and neutral faces, rendered unrecognizable by doing Fourier phase transformation. ERP findings revealed increased P1 amplitudes for fearful scrambles regardless of experimental conditions. Taken together, our findings show early emotional effects in the absence of any facial expression. Specific low‐level frequency information seems to increase P1 amplitudes which thus might have implications for the interpretation of very early sensory emotional expression effects.

中文翻译:

在没有面部信息的情况下,恐惧的面部混乱会增加早期的视觉感觉处理能力

情绪面部表情引起早期电生理反应的明显增加。许多研究报告甚至在刺激出现后约80和100毫秒时对非常早期的感觉处理进行了情绪调制(由P1索引)。通常将这些早期效应解释为索引对生物学相关表达的差异反应。由于特定的空间频率在令人恐惧的表情和中性表情之间有所不同,因此最近有人提出,这些早期的调制基本上是由这种低水平的视觉差异驱动的。然而,尚不清楚在根本不存在可识别的面部信息的实验中是否也观察到了类似的P1效应。这项研究调查了这个问题,并探讨了是否有任何效果取决于颜色信息和注意条件。参加者(N  = 20)难以连续地执行从低到高的连续感知任务,并呈现与任务无关的黑白和彩色图像,这些图像具有令人恐惧和中性的面孔,通过进行傅立叶相变变得无法识别。ERP的发现表明,不管实验条件如何,P1振幅都会增加,从而使人担心打扰。综上所述,我们的发现表明在没有任何面部表情的情况下,早期的情绪影响。特定的低频信息似乎会增加P1振幅,因此可能对非常早期的感官情感表达效应的解释产生影响。
更新日期:2021-01-12
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