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首页> 外文期刊>Neuron >Expectation modulates neural responses to pleasant and aversive stimuli in primate amygdala.
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Expectation modulates neural responses to pleasant and aversive stimuli in primate amygdala.

机译：期望调节灵长类杏仁核对愉快和厌恶刺激的神经反应。

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摘要

Animals and humans learn to approach and acquire pleasant stimuli and to avoid or defend against aversive ones. However, both pleasant and aversive stimuli can elicit arousal and attention, and their salience or intensity increases when they occur by surprise. Thus, adaptive behavior may require that neural circuits compute both stimulus valence--or value--and intensity. To explore how these computations may be implemented, we examined neural responses in the primate amygdala to unexpected reinforcement during learning. Many amygdala neurons responded differently to reinforcement depending upon whether or not it was expected. In some neurons, this modulation occurred only for rewards or aversive stimuli, but not both. In other neurons, expectation similarly modulated responses to both rewards and punishments. These different neuronal populations may subserve two sorts of processes mediated by the amygdala: those activated by surprising reinforcements of both valences-such as enhanced arousal and attention-and those that are valence-specific, such as fear or reward-seeking behavior.
机译：动物和人类学会接近并获得令人愉悦的刺激，避免或防御厌恶刺激。但是，令人愉悦的和令人反感的刺激都会引起唤醒和注意力，当它们突然出现时，它们的显着性或强度也会增加。因此，适应性行为可能需要神经回路同时计算刺激价或价值和强度。为了探索如何实现这些计算，我们研究了灵长类杏仁核对学习过程中意外增强的神经反应。许多杏仁核神经元对增强的反应不同，这取决于是否预期到。在某些神经元中，这种调节仅发生在奖励或厌恶刺激上，而并非同时发生。在其他神经元中，期望同样调节奖励和惩罚的反应。这些不同的神经元种群可能受杏仁核介导的两种过程的影响：由两种价的令人惊讶的增强激活的过程（例如增强的唤醒和注意力）以及与价有关的那些过程，例如恐惧或寻求奖励的行为。

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