Lateral habenula neurons signal errors in the prediction of reward information.

Lateral habenula neurons signal errors in the prediction of reward information.
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DOI:
10.1038/nn.2902
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发表时间:
2011-08-21
影响因子:
25
通讯作者:
Hikosaka O
Hikosaka O
中科院分区:
医学1区
文献类型:
--
作者:
Bromberg-Martin ES;Hikosaka O

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人类和动物具有预测未来事件的非凡能力,他们通过持续搜索环境中的预测信息来源来实现这一目标。然而,人们对激发这种行为的神经系统知之甚少。我们假设,信息寻求是由相同的电路,支持奖励寻求分配值,使神经信号编码传统的“奖励预测错误”包括类似的“信息预测错误”。为了验证这一点,我们记录了外侧缰核(一个编码奖励预测错误的核团)中的神经元,而猴子则在提供关于即将到来的奖励的不同信息量的线索之间进行选择。我们发现外侧缰核神经元的一个亚群传递类似于信息预测错误的信号,当奖励信息被意外提示、传递或拒绝时做出反应。他们的信号能够可靠地评估信息来源,即使动物的决定并不可靠。这些神经元可以为奖赏寻求和信息寻求行为提供共同的指导信号。
Humans and animals have a remarkable ability to predict future events, which they achieve by persistently searching their environment for sources of predictive information. Yet little is known about the neural systems that motivate this behavior. We hypothesized that information-seeking is assigned value by the same circuits that support reward-seeking, so that neural signals encoding conventional “reward prediction errors” include analogous “information prediction errors”. To test this we recorded from neurons in the lateral habenula, a nucleus which encodes reward prediction errors, while monkeys chose between cues that provided different amounts of information about upcoming rewards. We found that a subpopulation of lateral habenula neurons transmitted signals resembling information prediction errors, responding when reward information was unexpectedly cued, delivered, or denied. Their signals evaluated information sources reliably even when the animal’s decisions did not. These neurons could provide a common instructive signal for reward-seeking and information-seeking behavior.
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