Emotion affects action: Midcingulate cortex as a pivotal node of interaction between negative emotion and motor signals.
Emotion affects action: Midcingulate cortex as a pivotal node of interaction between negative emotion and motor signals.
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DOI：
10.3758/cabn.10.1.94
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发表时间：
2010-03
期刊：
影响因子：
--
通讯作者：
Pessoa L
中科院分区：
文献类型：
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作者：
Pereira MG;de Oliveira L;Erthal FS;Joffily M;Mocaiber IF;Volchan E;Pessoa L
情感图片驱动大脑网络的活动并影响行为。我们之前表明，观看不愉快的图片会干扰基本的非情感视觉检测任务的执行。在本研究中，我们采用功能磁共振成像来检验以下假设：行为干扰可能是由大脑中负价信号和运动相关信号之间的相互作用引起的。与我们之前的研究一样，受试者在呈现令人不快或中性的图片后执行了简单的目标检测任务。我们的结果表明，不愉快的情绪环境会调节参与简单目标检测任务的几个区域的诱发反应。特别是，当参与者在不愉快的环境中进行目标检测试验时，中扣带皮层被招募，并且该区域的信号反应密切反映了行为干扰的模式（如通过反应时间揭示的）。我们的研究结果表明，中扣带皮层可能是大脑中负价信号和运动信号之间相互作用的重要部位，并且它可能参与防御反应的实施，例如冻结。
Affective pictures drive the activity of brain networks and impact behavior. We showed previously that viewing unpleasant pictures interfered in the performance of a basic non-emotional visual detection task. In the present study, we employed functional magnetic resonance imaging to test the hypothesis that behavioral interference may result from the interaction between negatively valenced and motor-related signals in the brain. As in our previous study, subjects performed a simple target-detection task that followed the presentation of unpleasant or neutral pictures. Our results revealed that an unpleasant emotional context modulated evoked responses in several regions engaged by the simple target-detection task. In particular, the midcingulate cortex was recruited when participants performed target-detection trials during the unpleasant context and signal responses in this region closely mirrored the pattern of behavioral interference (as revealed via reaction time). Our findings suggest that the midcingulate cortex may be an important site for the interaction between negatively valenced and motor signals in the brain, and that it may be involved in the implementation of defensive responses, such as freezing.