甲基胺在预期损失时增强神经激活在货币激励延迟任务中的损失
Hanna Molla1, Sarah Keedy1, Joseph DeBrosse1
1Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL 60637, USA.
Cerebral cortex communications
|August 11, 2023
概括
甲基胺 (MA) 增加了大脑对潜在损失的反应,特别是在条体和胰岛,在决策任务期间. 这种刺激效应凸显了这些大脑区域如何处理即将到来的负面结果的突出性.
科学领域:
- 神经科学是一个神经科学.
- 心理药理学 心理药理学
- 认知科学 认知科学
背景情况:
- 兴奋剂,如甲胺 (MA),通过调节参与情绪,注意力和奖励处理的神经回路,显著影响动机行为.
- 有限的研究已经探索了刺激剂剂量对奖励回路在预期和接收奖励和损失期间的急性影响.
研究的目的:
- 为了研究单次20毫克的甲胺 (MA) 剂量与安慰剂相比对奖励回路内的神经活动的影响.
- 检查MA如何影响健康成年人的预期和接受金钱奖励和损失期间的大脑反应.
主要方法:
- 在43名健康成年参与者中,采用了主体内双盲研究设计.
- 功能性磁共振成像 (fMRI) 用于测量在货币激励延迟任务期间的大脑活动,特别是血氧水平依赖 (BOLD) 反应.
- 二次分析包括行为评估,全脑成像和动脉旋转标签,以测量大脑血液流动.
主要成果:
- 在预期潜在的货币损失期间,甲基胺的使用导致了预期的行为变化和腹部条纹体和前部岛屿的神经激活的增强.
- 没有观察到MA对神经激活在预期收益或在收到胜利或损失期间没有显著的影响.
- 在MA给药后,在条形体和胰岛的脑血流显著减少.
结论:
- 这些发现表明,甲基胺增强了条纹和岛屿系统对即将发生的负面结果的突出性敏感性.
- 这项研究有助于更细致地了解刺激药物如何影响潜在的动机行为背后的神经过程,特别是对潜在损失的反应.
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