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Alternative TitleII Neural Mechanisms of Attentional Modulation on Emotional Conflict Processing by Attention
Thesis Advisor刘勋
Degree Grantor中国科学院研究生院
Place of Conferral北京
Degree Discipline心理学
Keyword注意 自上而下 情绪冲突加工 自下而上
研究三核磁结果发现,情绪冲突加工与认知冲突加工激活的脑区,在相关任务中脑区的激活更广泛、更显著,情绪冲突加工与认知冲突加工的神经机制存在分离,它们都共同激活了内侧额叶、外侧额叶、扣带回、顶叶,但是情绪冲突加工特异性的激活了Rostral mPFC。计算建模的结果进一步验证了Egner等人的观点,情绪冲突解决是由负责执行控制的脑区通过抑制杏仁核对情绪干扰刺激的加工实现的,而认知冲突的解决,是由负责执行控制的脑区通过梭状回(FFA)对目标刺激的特征增强实现的。
Other AbstractThe ability to show coherent goal-directed behavior requires the detection and resolution of conflict, especially in the complex and changing environment. Understanding the influence of emotion which are intrinsically tied to one another in real life on this system is particularly important .Recent evidence seems to be contradictory with reports of emotion interacted with top-down attention. To tackle this controversy, the current study examined whether and to what degrees attention modulated processing of emotion conflict processing using a stimulus-response-compatibility (SRC) paradigm, in order to acquire more understanding the interaction of emotion processing and attention. Four studies are conducted to address the questions.
1. Behavioral studies found that emotion conflict processing was modulated by top-down attention just as non-emotional conflict processing. However, emotion conflict processing was less influenced by attention for their salience feature. And emotion conflict processing was influenced by the interactions of spatial and time factors. When the target and flankers were presented simultaneously, the relationship of emotion conflict and space was an inverted U shape.
2. The second section of our study found that emotion conflict processing was modulated by attention reflected by N200 effect in relevant task, and the difference between emotion incongruent and emotion congruent could be detected about 100ms(N100) after stimulus onset.
3. Wider and more significant neural mechanisms of emotional and non-emotional stimulus conflict processing were activated in relevant task. Lateral PFC, medial PFC, Parietal lobe, anterior cingulated cortex was activated in two tasks, but rostral medial PFC was activated only in emotion conflict processing. Egner et al.s’ proposal was also proved with a computational model of emotion conflict processing. We found that emotion conflict resolution was associated with decreased amygdale response to emotional distractors and non-emotion conflict resolution was associated with enhanced processing of target in sensory cortices.
In conclusion, human could detect emotional conflict earlier. However, the resolution of emotional conflict required more attentional resourses, indicating that the attitude of huaman was more serious facing the emotional conflict.
Subject Area认知神经科学
Document Type学位论文
Recommended Citation
GB/T 7714
周平艳. 注意对情绪冲突加工调控的机制[D]. 北京. 中国科学院研究生院,2013.
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