在vmPFC中的任务状态表示介于相关和不相关的价值信号及其行为影响
Nir Moneta1,2,3, Mona M Garvert4,5,6, Hauke R Heekeren7,8,9
1Max Planck Research Group NeuroCode, Max Planck Institute for Human Development, 14195, Berlin, Germany. moneta@mpib-berlin.mpg.de.
Nature communications
|May 31, 2023
概括
腹中前额叶皮层 (vmPFC) 根据任务背景灵活地在价值表示之间切换. 在vmPFC中,不相关的价值信号与相关的价值信号竞争,影响决策.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 决策 决策 决策 决策 决策
背景情况:
- 腹中前额叶皮层 (vmPFC) 参与表示指导选择的预期值信号.
- 对于相同的刺激的预期值可以根据具体的任务上下文而有所不同.
- 了解大脑如何灵活地适应价值表示对于解释任务依赖决策至关重要.
研究的目的:
- 研究大脑如何灵活地在不同的价值表示之间切换,以依赖于任务的方式.
- 要确定vmPFC是否与预期值一起编码任务上下文.
- 在vmPFC中探索相关和无关值信号之间的相互作用.
主要方法:
- 35名参与者完成了刺激颜色或运动预测奖励的任务.
- 参与者在这些不同的任务上下文之间交替工作.
- 使用多变量分析来检查vmPFC信号.
主要成果:
- vmPFC信号包含当前任务状态的表示 (上下文:运动/颜色).
- 这些信号包括与当前环境相关的预期值和来自替代环境的无关值.
- 不相关的价值表示与相关信号竞争,与任务状态表示相互作用,并与价值竞争的行为指标相关联.
结论:
- 根据任务需求,vmPFC可以灵活地维护和切换多个价值表示.
- 这些发现凸显了vmPFC内部价值竞争的机制,影响了决策.
- 这项研究弥合了对vmPFC在将观察结果映射到任务状态和计算上下文依赖的预期值方面的理解.
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