决策过程中的个体差异决定了介质边缘多巴胺如何调节选择信心和改变心态
Adrina Kocharian1,2, A David Redish3, Patrick E Rothwell3
1Graduate Program in Neuroscience, University of Minnesota Medical School, Minneapolis, MN.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
位于核中的多巴胺在评估和重新评估期间跟踪决策信心和价值. 操纵多巴胺释放会影响这些过程,特别是在考虑未来价值的小鼠中.
科学领域:
- 神经科学是一个神经科学.
- 决策研究 决策研究
- 行为经济学是一种行为经济学.
背景情况:
- 核 accumbens 多巴胺信号对于决策至关重要.
- 当前的模型往往过于简化了决策,认为决策是离散的,而不是连续的.
- 在理解多巴胺在意志决策和个人差异中的作用方面存在差距.
研究的目的:
- 调查核中多巴胺动力学如何调节连续的决策过程.
- 探索多巴胺在评估决策和改变思维过程中的过去和未来价值中的作用.
- 检查价值处理中的个体差异对多巴胺调节功能的影响.
主要方法:
- 在小鼠中利用了经济的食任务.
- 在核中记录了多巴胺动态.
- 采用光遗传学操纵中层多巴胺释放的方法.
主要成果:
- 核积分多巴胺信号反映了评估期间的决策信心.
- 多巴胺动力学在重新评估和改变心态时编码了过去和未来的价值.
- 对多巴胺释放的光遗传抑制改变了评估和重新评估,特别是在对未来价值敏感的小鼠中.
结论:
- 位于核中的多巴胺在持续的决策中起着动态的作用,包括评估和重新评估.
- 这些发现突显了多巴胺在整合过去和未来价值方面的参与,有助于自我引导的选择.
- 价值处理中的个人差异调节多巴胺如何影响决策策略.
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