Prefrontal mechanisms of behavioral flexibility, emotion regulation and value updating.

Prefrontal mechanisms of behavioral flexibility, emotion regulation and value updating.
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DOI:
10.1038/nn.3440
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发表时间:
2013-08
影响因子:
25
通讯作者:
Murray, Elisabeth A.
Murray, Elisabeth A.
中科院分区:
医学1区
文献类型:
--
作者:
Rudebeck, Peter H.;Saunders, Richard C.;Prescott, Anna T.;Chau, Lily S.;Murray, Elisabeth A.

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有两种观点主导了眶额皮质(OFC)的神经心理学。一种认为 OFC 通过抑制控制来调节情绪并增强行为灵活性。另一种观点认为 OFC 在根据当前动机状态更新估值方面发挥着作用。神经影像学、神经生理学和临床观察结果与其中一个或两个假设一致。尽管这些假设原则上是一致的,但目前的结果支持后一种 OFC 功能观点并反对前一种观点。我们发现,仅限于猴子 OFC 的兴奋毒性、纤维保留损伤不会改变行为灵活性(通过对象逆转学习测量)或情绪调节(通过蛇恐惧评估)。后续实验表明,之前关于抑制控制丧失的报道是由于附近纤维束的损伤而不是 OFC 功能障碍造成的。因此,OFC 在奖励引导的行为和情感中发挥着比目前想象的更专业的作用,其中包括价值更新。
Two ideas have dominated the neuropsychology of the orbitofrontal cortex (OFC). One holds that OFC regulates emotion and enhances behavioral flexibility through inhibitory control. The other ascribes to OFC a role in updating valuations based on current motivational states. Neuroimaging, neurophysiological and clinical observations are consistent with either or both hypotheses. Although these hypotheses are compatible in principle, the present results support the latter view of OFC function and argue against the former. We show that excitotoxic, fibersparing lesions confined to OFC in monkeys do not alter either behavioral flexibility, as measured by object reversal learning, or emotion regulation, as assessed by snake fear. A follow-up experiment indicates that previous reports of a loss of inhibitory control resulted from damage to nearby fiber tracts and not from OFC dysfunction. Thus, OFC plays a more specialized role in reward-guided behavior and emotion than currently thought, a function that includes value updating.
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