Brain potentials in affective picture processing: covariation with autonomic arousal and affective report
Brain potentials in affective picture processing: covariation with autonomic arousal and affective report
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DOI：
10.1016/s0301-0511(99)00044-7
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发表时间：
2000-03-01
影响因子：
2.6
通讯作者：
Lang, PJ
中科院分区：
文献类型：
--
作者：
Cuthbert, BN;Schupp, HT;Lang, PJ
情感唤起的图片刺激诱发了头皮记录的事件相关电位。观察到一种晚期的、缓慢的正电压变化，情感刺激引起的这种变化比中性刺激显著更大。这种正向偏移在图片呈现200 - 300毫秒后开始，在图片呈现约1秒后达到最大振幅，并在6秒的图片呈现期的大部分时间内持续存在。正向增加与内容类型的局部概率无关，但对于促使自主反应增强以及情感唤起程度更高（如色情或暴力内容）的图片更为明显。这些结果表明，晚期正波表明对情感刺激的选择性加工，反映了大脑中动机系统的激活。（C）2000爱思唯尔科学出版社。版权所有。
Emotionally arousing picture stimuli evoked scalp-recorded event-related potentials. A late, slow positive voltage change was observed, which was significantly larger for affective than neutral stimuli. This positive shift began 200-300 ms after picture onset: reached its maximum amplitude approximate to 1 s after picture onset, and was sustained for most of a 6-s picture presentation period. The positive increase was not related to local probability of content type, but was accentuated for pictures that prompted increased autonomic responses and reports of greater affective arousal (e.g. erotic or violent content). These results suggest that the late positive wave indicates a selective processing of emotional stimuli, reflecting the activation of motivational systems in the brain. (C) 2000 Elsevier Science B.V. All rights reserved.