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首页> 外文期刊>International journal of psychophysiology: official journal of the International Organization of Psychophysiology >Event-related brain potentials and affective responses to threat in spider/snake-phobic and non-phobic subjects.
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Event-related brain potentials and affective responses to threat in spider/snake-phobic and non-phobic subjects.

机译：事件相关的脑电势和对恐惧/蜘蛛和非恐惧受试者的威胁的情感反应。

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摘要

We investigated cortical responses and valence/arousal ratings of spider phobic, snake phobic, and healthy subjects while they were processing feared, fear-relevant, emotional neutral, and pleasant stimuli. Results revealed significantly larger amplitudes of late ERP components (P3 and late positive complex, LPC) but not of early components (N1, P2, N2) in phobics when subjects were processing feared stimuli. This fear-associated increase of amplitudes of late ERP components in phobic subjects was maximal at centro-parietal and occipital brain sites. Furthermore, phobics but not controls rated feared stimuli to be more negative and arousing than fear-relevant, emotional neutral, and pleasant stimuli. Since late ERP components and valence/arousal ratings were only significantly increased when phobic subjects but not when healthy controls were processing feared stimuli, the present data suggest that P3 and LPC amplitudes represent useful neural correlates of the emotional significance and meaning of stimuli.
机译：我们调查了在恐惧，恐惧相关，情绪中立和令人愉悦的刺激过程中，恐惧恐惧症，蜘蛛恐惧症和健康受试者的皮质反应和价/刺激等级。结果显示，在恐惧症患者处理恐惧刺激时，晚期ERP成分（P3和晚期阳性复合物，LPC）的幅度明显更大，而早期成分（N1，P2，N2）则没有。在恐惧的受试者中，这种与恐惧相关的晚期ERP成分的振幅增加在中央顶叶和枕脑部位最大。而且，与恐惧相关的，情绪中立的和令人愉悦的刺激相比，恐惧而不是控制等级的恐惧刺激具有更大的负面和刺激性。由于只有在恐惧的受试者时ERP的后期成分和效价/兴奋等级才会显着增加，而健康对照者在处理恐惧的刺激时则不会显着增加，因此目前的数据表明，P3和LPC幅度代表了情感意义和刺激意义的有用的神经相关性。

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