时间和奖励的竞争性整合解释了价值敏感的食决策和前皮层升动态
Michael Bukwich1, Malcolm G Campbell2, David Zoltowski3
1Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA; Center for Brain Science, Harvard University, Cambridge, MA 02138, USA; Sainsbury Wellcome Centre, University College London, London W1T 4JG, UK.
Neuron
|August 8, 2025
概括
动物通过平衡时间和奖励来做出复杂的食决策,受隐藏的耐心状态的影响. 额叶皮层在大脑中激增信号,为这个决策过程提供了一个神经机制.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 计算神经科学是一种神经科学.
背景情况:
- 补丁食是一种基本的行为,动物必须决定何时离开耗尽资源的补丁.
- 最佳食理论为理解这些决定提供了一个框架,但现实世界的行为往往偏离.
- 了解这些决定背后的神经机制对于解释动物行为至关重要.
研究的目的:
- 为了研究小鼠补丁食决策的行为机制和神经相关性.
- 开发计算模型,以捕捉现实的食行为,包括偏离最佳的偏差.
- 为了确定大脑区域和神经动力学参与整合时间和奖励信息在寻找食物.
主要方法:
- 开发了一个虚拟食任务,以系统地操纵补丁值并观察鼠标行为.
- 构建了整合时间和奖励信息的计算模型,由潜伏的耐心状态调节.
- 利用神经像素的录音来捕捉在搜索任务期间脑前部区域的神经活动.
主要成果:
- 鼠标的食行为系统地随着补丁值而变化,可以通过整合时间和奖励的模型来解释.
- 这些模型从数量上捕获了偏离最佳食预测的偏差.
- 在额叶皮层观察到分布式升级的神经信号,与模型决策变量相关.
- 这些神经信号表现出与时间,奖励和记忆的整合相一致的特征.
结论:
- 额叶皮层的升动态代表了解决补丁食问题的可信的神经机制.
- 这些发现为食决策提供了机制性的解释,超越了纯粹的规范模型.
- 这项研究将决策的计算模型与大脑中的特定神经实现联系起来.
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