Basal ganglia engagement during feedback processing after a substantial delay.
Basal ganglia engagement during feedback processing after a substantial delay.
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在大量延迟后反馈处理过程中，基底神经节的参与度。
DOI：
10.3758/s13415-013-0182-6
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发表时间：
2013-12
期刊：
影响因子：
--
通讯作者：
Tricomi E
中科院分区：
文献类型：
--
作者：
Dobryakova E;Tricomi E
纹状体已被证明在学习与成绩相关的反馈方面发挥着重要作用，这些反馈在每次反应后不久就会出现。然而，人们对支持从反馈中学习的神经机制知之甚少，反馈比最初的反应延迟了很多。由于一个人的行为的后果通常要到延迟之后才能知道，因此了解延迟反馈是否会产生与即时反馈类似的神经反应是很重要的。我们通过使用功能磁共振成像(FMRI)来研究这个问题，因为参与者进行了180个不同试验的配对联想学习任务。表明回答准确性的反馈立即呈现，在延迟25分钟后呈现，或者根本没有。与没有反馈相比，即时反馈和延迟反馈都显著提高了后测的准确性。重复以前的工作，我们发现当反馈立即呈现时，正反馈比负反馈表现出更大的尾状核激活。此外，延迟反馈还导致尾状核活动由正反馈到负反馈的差异。相对于无反馈和延迟正反馈，延迟的负反馈也产生了壳核和苍白球(豆状核)的显著激活。这表明，尾状核对反馈的情感性质非常敏感，跨越不同的时间尺度，而豆状核可能在相当长的延迟后特别参与处理负反馈所携带的信息。
The striatum has been shown to play an important role in learning from performance-related feedback that is presented shortly after each response. However, less is known about the neural mechanisms supporting learning from feedback that is substantially delayed from the original response. Since the consequences of one’s actions often do not become known until after a delay, it is important to understand whether delayed feedback can produce neural responses similar to those elicited by immediate feedback presentation. We investigated this issue by using functional magnetic resonance imaging (fMRI) as participants performed a paired-associate learning task with 180 distinct trials. Feedback indicating response accuracy was presented immediately, after a delay of 25 minutes, or not at all. Both immediate and delayed feedback led to significant gains in accuracy on a post-test, relative to no feedback. Replicating previous work, we found that the caudate nuclei showed greater activation for positive feedback than negative feedback when the feedback was presented immediately. In addition, delayed feedback also led to differential caudate activity to positive versus negative feedback. Delayed negative feedback also produced significant activation of the putamen and globus pallidus (the lentiform nucleus), relative to no feedback and delayed positive feedback. This suggests that the caudate nucleus is sensitive to the affective nature of feedback, across different timescales, while the lentiform nucleus may be particularly involved in processing the information carried by negative feedback after a substantial delay.
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