Effects of task demands on the early neural processing of fearful and happy facial expressions
Effects of task demands on the early neural processing of fearful and happy facial expressions
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DOI：
10.1016/j.brainres.2017.03.013
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发表时间：
2017-05-15
期刊：
影响因子：
2.9
通讯作者：
Neath-Tavares, Karly N.
中科院分区：
文献类型：
--
作者：
Itier, Roxane J.;Neath-Tavares, Karly N.
任务需求塑造了我们如何处理环境刺激，但它们对面部表情的早期神经处理的影响仍不清楚。在一个主题内的设计，ERP被记录到相同的恐惧，快乐和中性的面部表情，在性别歧视，明确的情绪歧视和古怪的检测任务，在该领域中研究最多的任务。使用眼动仪，固定在脸上的鼻子是强制使用凝视特遣队介绍。任务要求调制幅度从200到350毫秒在枕-颞网站跨越EPN组件。从150到350毫秒，从N170开始，振幅比中性表达更负，具有颞枕分布，而没有看到快乐表达的明显影响。任务和情绪的影响从来没有相互作用，在任何时间窗口或ERP组件分析（P1，N170，EPN）。因此，无论情绪是明确的歧视或无关的任务在手，神经相关的恐惧和快乐的面部表情似乎免疫这些任务的要求在第一个350毫秒的视觉处理。(C)2017爱思唯尔B. V.保留所有权利。
Task demands shape how we process environmental stimuli but their impact on the early neural processing of facial expressions remains unclear. In a within-subject design, ERPs were recorded to the same fearful, happy and neutral facial expressions presented during a gender discrimination, an explicit emotion discrimination and an oddball detection tasks, the most studied tasks in the field. Using an eye tracker, fixation on the face nose was enforced using a gaze-contingent presentation. Task demands modulated amplitudes from 200 to 350 ms at occipito-temporal sites spanning the EPN component. Amplitudes were more negative for fearful than neutral expressions starting on N170 from 150 to 350 ms, with a temporo-occipital distribution, whereas no clear effect of happy expressions was seen. Task and emotion effects never interacted in any time window or for the ERP components analyzed (P1, N170, EPN). Thus, whether emotion is explicitly discriminated or irrelevant for the task at hand, neural correlates of fearful and happy facial expressions seem immune to these task demands during the first 350 ms of visual processing. (C) 2017 Elsevier B.V. All rights reserved.