Acute stress alters neural patterns of value representation for others
Acute stress alters neural patterns of value representation for others
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急性压力会改变他人价值表征的神经模式
DOI：
10.1016/j.neuroimage.2019.116497
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发表时间：
2019
期刊：
影响因子：
5.7
通讯作者：
C. Lamm
中科院分区：
文献类型：
--
作者：
L. Tomova;R. Saxe;M. Klöbl;R. Lanzenberger;C. Lamm
急性压力通常是在社会交往中，由他人的威胁感或负面评价引起的。我们也经常在压力下与他人互动——无论是在工作场所还是在私人场合。然而，目前还不清楚压力是如何影响社会互动的。首先，个人可能会变得更加自私，专注于自己的目标。另一方面，个人也可能变得更加注重与潜在的社会伙伴建立联系，以获得他们的支持。的确，越来越多的行为证据表明，在压力下，亲社会行为会增加而不是减少。在这里，我们通过评估压力对自我和他人（金钱）价值的神经表征的影响，测试了这些发现的潜在大脑过程。参与者（N = 30；男性，18-40岁）在接受功能磁共振成像（fMRI）的同时，为自己和另一名参与者玩了一个赌博任务。每个参与者都玩了两次赌博任务：一次是在急性应激诱导之后，一次是在控制阶段。采用表征相似性分析（RSA）方法比较了纹状体、背内侧前额叶皮层（dmPFC）、腹内侧前额叶皮层（vmPFC）和背内侧前额叶皮层价值表征的神经模式。我们发现，在应激条件下，dmPFC和纹状体表现出较高的神经模式差异性。高自我价值和低自我价值的神经模式差异不受压力的影响。这些发现表明，在压力下，参与者更关注他人可能得到的奖励的大小，这表明亲社会倾向增加。
Acute stress is often evoked during social interactions, by feelings of threat or negative evaluation by other people. We also constantly interact with others while under stress – in the workplace or in private alike. However, it is not clear how stress affects social interactions. For one, individuals could become more selfish and focused on their own goals. On the other hand, individuals might also become more focused on affiliating with potential social partners, in order to secure their support. There is, indeed, accumulating behavioral evidence that prosocial behaviors increase rather than decrease under stress. Here, we tested the underlying brain processes of such findings, by assessing the effects of stress on the neural representations of (monetary) value for self and other. Participants (N = 30; male, 18–40 years) played a gambling task for themselves and for another participant while undergoing functional magnetic resonance imaging (fMRI). Each participant played the gambling task twice: once immediately following acute stress induction, and once in a control session. We compared neural patterns of value representation in the dorsomedial prefrontal cortex (dmPFC), ventromedial prefrontal cortex (vmPFC) and striatum using representational similarity analysis (RSA). We found that under stress, dmPFC and striatum showed higher dissimilarity between neural patterns underlying high and low value for the other. Dissimilarity of neural patterns underlying high and low value for the self was unaffected by stress. These findings suggest that participants track the magnitude of possible rewards for others more under stress, suggesting increased prosocial orientation.
影响因子：
4.2
作者：
Clithero, John A.;Rangel, Antonio
通讯作者：
Rangel, Antonio
通过模型比较对奖励预测错误和奖励接收的 BOLD 反应进行分离
影响因子：
3.4
作者：
Rohe T;Weber B;Fliessbach K
通讯作者：
Fliessbach K