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首页> 外文期刊>Neuron >How green is the grass on the other side? Frontopolar cortex and the evidence in favor of alternative courses of action.
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How green is the grass on the other side? Frontopolar cortex and the evidence in favor of alternative courses of action.

机译：另一边的草有多绿？前额叶皮层和支持替代作用过程的证据。

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摘要

Behavioral flexibility is the hallmark of goal-directed behavior. Whereas a great deal is known about the neural substrates of behavioral adjustment when it is explicitly cued by features of the external environment, little is known about how we adapt our behavior when such changes are made on the basis of uncertain evidence. Using a Bayesian reinforcement-learning model and fMRI, we show that frontopolar cortex (FPC) tracks the relative advantage in favor of switching to a foregone alternative when choices are made voluntarily. Changes in FPC functional connectivity occur when subjects finally decide to switch to the alternative behavior. Moreover, interindividual variation in the FPC signal predicts interindividual differences in effectively adapting behavior. By contrast, ventromedial prefrontal cortex (vmPFC) encodes the relative value of the current decision. Collectively, these findings reveal complementary prefrontal computations essential for promoting short- and long-term behavioral flexibility.
机译：行为灵活性是目标导向行为的标志。当行为调节的神经基础被外部环境的特征明确提示时，人们对它的知情知之甚少，而在不确定的证据基础上做出这种改变时，我们如何适应我们的行为知之甚少。使用贝叶斯强化学习模型和功能磁共振成像，我们表明额叶皮层（FPC）跟踪相对优势，有利于在自愿做出选择时切换到已放弃的替代方法。当受试者最终决定切换至其他行为时，FPC功能连接性就会发生变化。此外，FPC信号中的个体差异预测了有效适应行为的个体差异。相比之下，腹膜前额叶皮层（vmPFC）编码当前决策的相对值。总的来说，这些发现揭示了互补的额前计算对于促进短期和长期的行为灵活性至关重要。

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