Identifying P100 and N170 as electrophysiological markers for conscious and unconscious processing of emotional facial expressions.

IF 2.6 3区医学 Q2 BEHAVIORAL SCIENCES

Frontiers in Behavioral Neuroscience Pub Date : 2025-01-23 eCollection Date: 2024-01-01 DOI:10.3389/fnbeh.2024.1464888

Lennard Herzberg, Julia Schräder, Han-Gue Jo, Ute Habel, Lisa Wagels

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Abstract

Introduction: Everyday life requires correct processing of emotions constantly, partly occurring unconsciously. This study aims to clarify the effect of emotion perception on different event-related potentials (ERP; P100, N170). The P100 and N170 are tested for their suitability as electrophysiological markers in unconscious processing.

Methods: Using a modified backward masking paradigm, 52 healthy participants evaluated emotional facial expressions (happy, sad, or neutral) during EEG recording. While varying primer presentation time (16.7 ms for unconscious; 150 ms for conscious perception), either congruent or incongruent primer / target emotions were displayed.

Results: The N170 was significantly larger in trials with conscious compared to unconscious primer presentation, while the P100 showed opposite results displaying higher amplitudes in unconscious versus conscious trials. The N170 amplitude was modulated by emotion.

Discussion: Both P100 and N170 were modulated by stimulus presentation time, demonstrating the suitability as potential biomarkers and for systematic research on conscious and unconscious face processing.

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确定P100和N170是有意识和无意识处理情绪性面部表情的电生理标记。

日常生活需要不断地对情绪进行正确的处理，其中一部分是无意识的。本研究旨在阐明情绪知觉对不同事件相关电位(ERP；P100, N170)。测试了P100和N170在无意识加工中作为电生理标记的适用性。方法：采用改进的后向掩蔽范式，对52名健康受试者在脑电图记录期间的面部表情（快乐、悲伤或中性）进行评估。不同引物呈现时间(无意识组16.7 ms；150 ms（有意识知觉），显示一致或不一致的引物/目标情绪。结果：N170在引物无意识呈现时明显大于N170，而P100在引物无意识呈现时明显大于P100。N170振幅受情绪调节。讨论：P100和N170都受到刺激呈现时间的调节，证明了作为潜在生物标志物的适用性，以及对有意识和无意识面部加工的系统研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Behavioral Neuroscience BEHAVIORAL SCIENCES-NEUROSCIENCES

CiteScore

4.70

自引率

3.30%

发文量

506

审稿时长

6-12 weeks

期刊介绍： Frontiers in Behavioral Neuroscience is a leading journal in its field, publishing rigorously peer-reviewed research that advances our understanding of the neural mechanisms underlying behavior. Field Chief Editor Nuno Sousa at the Instituto de Pesquisa em Ciências da Vida e da Saúde (ICVS) is supported by an outstanding Editorial Board of international experts. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, clinicians and the public worldwide. This journal publishes major insights into the neural mechanisms of animal and human behavior, and welcomes articles studying the interplay between behavior and its neurobiological basis at all levels: from molecular biology and genetics, to morphological, biochemical, neurochemical, electrophysiological, neuroendocrine, pharmacological, and neuroimaging studies.