无模型和基于模型的对照之间的仲裁不会受到性血清激素水平暂时变化的影响
Maximilian D Gilger1, Lydia Hellrung1,2, Philipp T Neukam1,3
1Department of Psychiatry and Psychotherapy, Technische Universität Dresden, Dresden, Germany.
Journal of psychopharmacology (Oxford, England)
|December 28, 2023
概括
改变血清激素水平并没有影响决策控制策略,特别是基于模型的与无模型的系统. 这项研究发现,与色胺调节相关的行为或大脑活动没有显著的变化.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 决策研究 决策研究
背景情况:
- 血清激素参与决策,影响基于模型和无模型控制之间的平衡.
- 这些控制机制的失调与精神健康状况有关,如药物依赖和强迫症.
- 以前的研究表明,低血清会降低基于模型的控制,但血清增加的影响仍然不清楚,神经支柱也是如此.
研究的目的:
- 为了确定调节增强性血清素水平是否会影响无模型和基于模型的控制之间的仲裁.
- 确定介导任何此类效应的神经机制.
主要方法:
- 在一个随机,双盲,交叉设计中,与98名参与者一起使用了一种连续的两阶段马尔科夫决策任务.
- 使用托芬干预 (加载,平衡,耗尽) 来操纵血清素水平.
- 功能磁共振成像 (fMRI) 用于测量大脑反应.
主要成果:
- 改变性血清素水平对无模型或基于模型的对照没有显著的影响.
- 托干预并没有导致大脑血液氧化水平依赖 (BOLD) 活动的显著变化.
结论:
- 增强性血清激素水平似乎在调节基于模型和无模型决策控制之间的平衡方面没有发挥关键作用.
- 测试的血清激素操纵并没有改变与这些控制机制相关的神经活动.
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