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首页> 美国卫生研究院文献>Brain >Dorsal striatum is necessary for stimulus-value but not action-value learning in humans
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Dorsal striatum is necessary for stimulus-value but not action-value learning in humans

机译：背侧纹状体对于人类的刺激价值学习而不是行动价值学习是必需的

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摘要

Several lines of evidence implicate the striatum in learning from experience on the basis of positive and negative feedback. However, the necessity of the striatum for such learning has been difficult to demonstrate in humans, because brain damage is rarely restricted to this structure. Here we test a rare individual with widespread bilateral damage restricted to the dorsal striatum. His performance was impaired and not significantly different from chance on several classic learning tasks, consistent with current theories regarding the role of the striatum. However, he also exhibited remarkably intact performance on a different subset of learning paradigms. The tasks he could perform can all be solved by learning the value of actions, while those he could not perform can only be solved by learning the value of stimuli. Although dorsal striatum is often thought to play a specific role in action-value learning, we find surprisingly that dorsal striatum is necessary for stimulus-value but not action-value learning in humans.
机译：有几条证据暗示着在正面和负面反馈的基础上从经验中学习的纹状体。然而，很难在人类中证明纹状体对于这种学习的必要性，因为脑损伤很少局限于这种结构。在这里，我们测试了一个罕见的个体，该个体的背侧纹状体受到广泛的双侧损害。他的表现受到损害，与几项经典学习任务的机会没有显着差异，这与有关纹状体作用的最新理论是一致的。但是，他在不同的学习范例子集上也表现出了明显的完整表现。他可以执行的任务都可以通过学习动作的价值来解决，而他不能执行的任务只能通过学习刺激的价值来解决。尽管人们通常认为背侧纹状体在行动价值学习中起特定作用，但令人惊讶地发现，背纹状体对于人类的刺激值学习是必需的，而对行动价值学习却不是必需的。

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