时间规律塑造了感知决策和条状多巴胺信号
Matthias Fritsche1, Antara Majumdar2, Lauren Strickland2,3
1Department of Physiology, Anatomy & Genetics, University of Oxford, Oxford, UK. Matthias.Fritsche@dpag.ox.ac.uk.
Nature communications
|August 17, 2024
概括
小鼠适应他们的感知选择历史偏见,以改变视觉刺激的时间规律性. 这种适应性偏差,由背上条纹体中的多巴胺跟踪,有助于利用环境模式.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 动物行为 动物行为
背景情况:
- 感知决策受到感官证据的影响,也受到过去的选择和结果的影响.
- 选择历史偏见可能代表利用自然环境中的时间规律性的适应性策略.
- 观察者调整这些偏差以适应不同的时间规律的能力在很大程度上仍未被探索.
研究的目的:
- 调查观察者是否以及如何将他们的感知选择历史偏见适应不同的时间规律.
- 阐明基础上的自适应选择历史偏见的计算原理和神经相关性.
主要方法:
- 用雄性小鼠进行行为实验,这些小鼠接触到具有不同时间规律的视觉刺激.
- 选择历史偏差的分析,区分快速和慢速组件.
- 使用具有多试验信念状态的规范强化学习算法进行建模.
- 在体内监测背上条纹性多巴胺活性.
主要成果:
- 雄性小鼠在数百次试验中证明了感知选择历史偏差与不同时间规律的适应.
- 缓慢的适应性偏差在几天内演变,与快速的,非适应性偏差共存.
- 强化学习模型准确地捕获了快速和缓慢的历史效应.
- 背带状多巴胺水平与模型的预测和观察到的行为相关,表明奖励预测信号.
结论:
- 感知选择历史偏差是适应性的,可以通过环境中的时间规律来修改.
- 规范性强化学习框架有效地解释了这些适应性偏差的计算基础.
- 背带状多巴胺在与适应性选择史偏见相关的奖励预测信号中发挥着至关重要的作用.
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