具体情绪到元情绪的ERP研究
发布时间：2018-08-28 13:53
【摘要】：情绪的脑机制研究作为情绪的认知神经科学的主攻方向,近年来日渐受到研究者的重视。Dolcos (2004)应用fMRI技术,在情绪感知研究中发现前额皮层和杏仁核的作用,杏仁核能对刺激的基本情绪色彩快速觉察,而前额皮层在高级的情绪评价过程中起重要作用。有不少研究发现,在大脑皮层的额叶、中央叶和顶叶,情绪图片比中性图片诱发了更大的晚正波幅。 基于情绪的发展性问题考虑,本研究利用ERP技术对个体具体情绪体验与元情绪状态之间的关系进行探索性研究。研究采用情绪的图片感知范式,标准化场景性情绪图片,反映一致性平均在80%以上,区分出具体情绪类别：愉快,悲伤,厌恶和恐惧。实验一为4(情绪类别：愉快、悲伤、厌恶和恐惧)×5(电极位置：Fpz、Fz、 Cz、 Pz、 Oz)的被试内实验设计；实验二为2(两种情绪状态)×4(情绪类别)的被试内实验设计,ERPs分析电极选取脑中线5个电极(前额区,FPZ；额区,FZ；中央区,CZ；顶区,PZ；枕区,OZ)进行分析。 结果表明：个体对不同具体情绪体验的反应时存在差异；个体报告元情绪状态要比报告基本情绪状态所用反应时更长；不同具体情绪情况下的元情绪的反应时存在差异；被试报告具体情绪的脑波变化与报告元情绪状态的脑波变化存在差异。不同情绪体验的波幅与电极位置间具有显著的交互作用,不同情绪体验在不同脑区电极点引起的脑波波幅不同,恐惧情绪体验在不同脑区均会引起比其他情绪体验更正的波幅,而厌恶情绪体验的波幅均会引起比其他情绪体验更负的波幅。个体报告具体情绪体验与元情绪自我觉察过程中,约在图片呈现后250msERPs出现分离；250ms之前两过程的ERPs在潜伏期和波幅上均不存在差异,250ms到300ms,以及300ms到800ms之间ERPs波幅上均存在显著差异；个体在对自身情绪进行觉察的过程中,ERPs波幅更低。额区比顶区和枕区出现更加明显的分离现象,且额区出现更加显著的激活。 结论：恐惧情绪体验的反应时最短,其次是愉快情绪体验,悲伤和厌恶情绪体验的反应时相对较长,且彼此间差异显著；四种情绪体验在不同脑区电极点引起的脑波波幅不同,恐惧情绪体验引起的波幅更正,厌恶情绪体验引起的波幅更负。四种情绪元情绪自我觉察状态的反应时存在显著差异；个体具体情绪体验的波幅比元情绪自我觉察状态的波幅更正,个体具体情绪体验过程与元情绪自我觉察过程存在不同的神经机制；个体元情绪自我觉察对情绪感受具有抑制作用。
[Abstract]:The brain mechanism of emotion, as the main direction of cognitive neuroscience of emotion, has been paid more and more attention by researchers in recent years. Dolcos (2004) applied fMRI technology to the study of emotion perception and discovered the role of prefrontal cortex and amygdala. Amygdala nuclear energy can quickly detect the basic emotional color of stimuli, and the prefrontal cortex plays an important role in the process of high emotional evaluation. A number of studies have found that in the frontal, central and parietal lobes of the cerebral cortex, emotional images induce greater late positive amplitude than neutral images. Based on the developmental problem of emotion, the relationship between individual specific emotional experience and meta-emotional state is studied by using ERP technology. The research adopts the image perception paradigm of emotion, standardizes the scene emotion picture, the reflection consistency is above 80% on average, distinguishes the specific emotion category: pleasure, sadness, disgust and fear. Experiment 1 was designed for 4 (emotional categories: pleasure, sadness, disgust and fear) 脳 5 (electrode position: FPZZ, Cz, Pz, Oz); In experiment 2 (two emotional states) 脳 4 (emotion category), the ERPs analysis electrode was designed to select 5 electrodes (prefrontal FPZ; frontal FZ; central region CZ; parietal PZ; occipital region OZ). The results show that there are differences in the reaction time of individual to specific emotional experience, the reaction time of individual reporting meta emotional state is longer than that of reporting basic emotional state, the reaction time of meta emotion is different under different specific emotional conditions. There was a difference between the change of brain wave in specific emotion and the change of brain wave in the state of reporting meta-emotion. There was significant interaction between the amplitude of different emotional experience and the electrode position. The amplitude of brain wave caused by different emotional experience in different brain regions was different, and the amplitude of fear emotion experience in different brain regions was more correct than that of other emotional experiences. The amplitude of aversion to emotional experience is more negative than other emotional experiences. In the process of individual reporting specific emotional experience and meta-emotional self-awareness, there is a separation of 250msERPs after the picture is presented. There was no significant difference in the latency and amplitude of ERPs between 250 Ms and 300 Ms in the two processes before 250ms, and there were significant differences in the amplitudes of ERPs between 300ms and 800ms, and the amplitude of ERPs was lower in the process of perceiving one's own emotions. The frontal area is more distinct than the parietal area and occipital area, and the frontal area is more activated. Conclusion: the reaction time of fear emotional experience is the shortest, the second is pleasant emotional experience, the reaction time of sad and disgust emotional experience is relatively long, and the difference between them is significant. The amplitude correction caused by fear emotion experience is more negative than that caused by aversion emotion experience. There were significant differences in the response time of the four emotional meta-emotional self-awareness states, the amplitude of individual specific emotional experience was higher than that of meta-emotional self-awareness state. There are different neural mechanisms between the process of individual specific emotional experience and the process of meta-emotional self-awareness, and individual meta-emotional self-awareness has an inhibitory effect on emotional feelings.
【学位授予单位】：信阳师范学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：B842.6
本文编号：2209586
[Abstract]:The brain mechanism of emotion, as the main direction of cognitive neuroscience of emotion, has been paid more and more attention by researchers in recent years. Dolcos (2004) applied fMRI technology to the study of emotion perception and discovered the role of prefrontal cortex and amygdala. Amygdala nuclear energy can quickly detect the basic emotional color of stimuli, and the prefrontal cortex plays an important role in the process of high emotional evaluation. A number of studies have found that in the frontal, central and parietal lobes of the cerebral cortex, emotional images induce greater late positive amplitude than neutral images. Based on the developmental problem of emotion, the relationship between individual specific emotional experience and meta-emotional state is studied by using ERP technology. The research adopts the image perception paradigm of emotion, standardizes the scene emotion picture, the reflection consistency is above 80% on average, distinguishes the specific emotion category: pleasure, sadness, disgust and fear. Experiment 1 was designed for 4 (emotional categories: pleasure, sadness, disgust and fear) 脳 5 (electrode position: FPZZ, Cz, Pz, Oz); In experiment 2 (two emotional states) 脳 4 (emotion category), the ERPs analysis electrode was designed to select 5 electrodes (prefrontal FPZ; frontal FZ; central region CZ; parietal PZ; occipital region OZ). The results show that there are differences in the reaction time of individual to specific emotional experience, the reaction time of individual reporting meta emotional state is longer than that of reporting basic emotional state, the reaction time of meta emotion is different under different specific emotional conditions. There was a difference between the change of brain wave in specific emotion and the change of brain wave in the state of reporting meta-emotion. There was significant interaction between the amplitude of different emotional experience and the electrode position. The amplitude of brain wave caused by different emotional experience in different brain regions was different, and the amplitude of fear emotion experience in different brain regions was more correct than that of other emotional experiences. The amplitude of aversion to emotional experience is more negative than other emotional experiences. In the process of individual reporting specific emotional experience and meta-emotional self-awareness, there is a separation of 250msERPs after the picture is presented. There was no significant difference in the latency and amplitude of ERPs between 250 Ms and 300 Ms in the two processes before 250ms, and there were significant differences in the amplitudes of ERPs between 300ms and 800ms, and the amplitude of ERPs was lower in the process of perceiving one's own emotions. The frontal area is more distinct than the parietal area and occipital area, and the frontal area is more activated. Conclusion: the reaction time of fear emotional experience is the shortest, the second is pleasant emotional experience, the reaction time of sad and disgust emotional experience is relatively long, and the difference between them is significant. The amplitude correction caused by fear emotion experience is more negative than that caused by aversion emotion experience. There were significant differences in the response time of the four emotional meta-emotional self-awareness states, the amplitude of individual specific emotional experience was higher than that of meta-emotional self-awareness state. There are different neural mechanisms between the process of individual specific emotional experience and the process of meta-emotional self-awareness, and individual meta-emotional self-awareness has an inhibitory effect on emotional feelings.
【学位授予单位】：信阳师范学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：B842.6
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