Neuronal origins of choice variability in economic decisions.

Neuronal origins of choice variability in economic decisions.
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DOI:
10.1016/j.neuron.2013.09.013
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发表时间:
2013-12-04
期刊:
影响因子:
16.2
通讯作者:
Padoa-Schioppa C
Padoa-Schioppa C
中科院分区:
医学1区
文献类型:
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作者:
Padoa-Schioppa C

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为了研究经济决策形成的机制,我检测了猴子在选择不同果汁时眶额皮层神经元的活动。不同类别的细胞编码了单个报价的价值(报价价值)、所选选项的价值(所选价值)或所选果汁的身份(所选果汁)。选择的变异性部分解释了重复选择的倾向(选择滞后)。令人惊讶的是,近乎无差别的决定并没有反映出报价价值细胞活动的波动。相比之下,近乎无差异的决定与所选果汁细胞的报价前活动的波动相关。在提供之后,所选择的果汁细胞的活动反映了决策难度,但不像一个种族的门槛。最后,选择的值单元提出了一个“活动超调”密切相关的决策难度,可能是由于波动的相对价值的果汁。这种过冲与选择滞后无关。
To investigate the mechanisms through which economic decisions are formed, I examined the activity of neurons in the orbitofrontal cortex while monkeys chose between different juice types. Different classes of cells encoded the value of individual offers (offer value), the value of the chosen option (chosen value), or the identity of the chosen juice (chosen juice). Choice variability was partly explained by the tendency to repeat choices (choice hysteresis). Surprisingly, near-indifference decisions did not reflect fluctuations in the activity of offer value cells. In contrast, near-indifference decisions correlated with fluctuations in the pre-offer activity of chosen juice cells. After the offer, the activity of chosen juice cells reflected the decision difficulty but did not resemble a race-to-threshold. Finally, chosen value cells presented an “activity overshooting” closely related to the decision difficulty and possibly due to fluctuations in the relative value of the juices. This overshooting was independent of choice hysteresis.
额叶中的神经元编码多个决策变量的值。
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