Temporal dynamics of emotional responding: amygdala recovery predicts emotional traits
Temporal dynamics of emotional responding: amygdala recovery predicts emotional traits
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DOI：
10.1093/scan/nss131
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发表时间：
2014-02-01
影响因子：
4.2
通讯作者：
Davidson, Richard J.
中科院分区：
文献类型：
--
作者：
Schuyler, Brianna S.;Kral, Tammi R. A.;Davidson, Richard J.
一个人的情感风格受到许多因素的影响，包括个人对情感挑战的反应方式。情绪反应由许多因素组成，其中两个是对情绪刺激的初始反应，以及一旦刺激终止或不再相关时的后续恢复。然而，大多数研究人类情绪处理的神经影像学研究关注的是对刺激的初始反应的大小，而不是长期反应。在这项研究中，我们使用功能磁共振成像研究的时间过程中杏仁核活动的健康成年人的负面形象的介绍作出反应。我们将杏仁核的时间过程分为初始反应期和刺激抵消后开始的恢复期。我们发现杏仁核的初始反应并不能预测情感风格的特征指标。相反，杏仁核的恢复显示出预测能力，杏仁核从负面图像中恢复得越慢，除了对一组社会刺激（中性面孔）的喜爱程度越低外，还预测出更大的特质神经质。这些数据强调了在使用神经成像研究情感处理时考虑时间动态的重要性。
An individual's affective style is influenced by many things, including the manner in which an individual responds to an emotional challenge. Emotional response is composed of a number of factors, two of which are the initial reactivity to an emotional stimulus and the subsequent recovery once the stimulus terminates or ceases to be relevant. However, most neuroimaging studies examining emotional processing in humans focus on the magnitude of initial reactivity to a stimulus rather than the prolonged response. In this study, we use functional magnetic resonance imaging to study the time course of amygdala activity in healthy adults in response to presentation of negative images. We split the amygdala time course into an initial reactivity period and a recovery period beginning after the offset of the stimulus. We find that initial reactivity in the amygdala does not predict trait measures of affective style. Conversely, amygdala recovery shows predictive power such that slower amygdala recovery from negative images predicts greater trait neuroticism, in addition to lower levels of likability of a set of social stimuli (neutral faces). These data underscore the importance of taking into account temporal dynamics when studying affective processing using neuroimaging.