Prediction error in dopamine neurons during associative learning

IF 2.4 4区 医学 Q3 NEUROSCIENCES Neuroscience Research Pub Date : 2024-02-01 DOI:10.1016/j.neures.2023.07.003
Ryunosuke Amo
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Abstract

Dopamine neurons have long been thought to facilitate learning by broadcasting reward prediction error (RPE), a teaching signal used in machine learning, but more recent work has advanced alternative models of dopamine’s computational role. Here, I revisit this critical issue and review new experimental evidences that tighten the link between dopamine activity and RPE. First, I introduce the recent observation of a gradual backward shift of dopamine activity that had eluded researchers for over a decade. I also discuss several other findings, such as dopamine ramping, that were initially interpreted to conflict but later found to be consistent with RPE. These findings improve our understanding of neural computation in dopamine neurons.

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多巴胺神经元在联想学习过程中的预测误差
长期以来,多巴胺神经元一直被认为是通过播报奖赏预测误差(RPE)来促进学习的,而奖赏预测误差是机器学习中使用的一种教学信号。在此,我将重新探讨这一关键问题,并回顾新的实验证据,以加强多巴胺活动与 RPE 之间的联系。首先,我介绍了最近观察到的多巴胺活动逐渐后移的现象,这一现象十多年来一直困扰着研究人员。我还讨论了其他一些发现,如多巴胺斜坡,这些发现最初被解释为与 RPE 相冲突,但后来发现与 RPE 是一致的。这些发现增进了我们对多巴胺神经元神经计算的了解。
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来源期刊
Neuroscience Research
Neuroscience Research 医学-神经科学
CiteScore
5.60
自引率
3.40%
发文量
136
审稿时长
28 days
期刊介绍: The international journal publishing original full-length research articles, short communications, technical notes, and reviews on all aspects of neuroscience Neuroscience Research is an international journal for high quality articles in all branches of neuroscience, from the molecular to the behavioral levels. The journal is published in collaboration with the Japan Neuroscience Society and is open to all contributors in the world.
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