额叶皮层不同区域的损伤对人类的自愿持续性有分离的影响
Camilla van Geen1, Yixin Chen2, Rebecca Kazinka3
1Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania 19104 cvg@sas.upenn.edu.
概括
了解等待奖励的时间涉及大脑活动. 腹中介前额叶皮层 (vmPFC) 的病变减少了等待,而背中介前额叶皮层 (dmPFC) 和前端岛 (AI) 的损伤损害了适应性等待.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 决策 决策 决策 决策
背景情况:
- 等待不确定的奖励需要平衡奖励价值与机会成本.
- 之前的研究将腹中前额叶皮层 (vmPFC),背中前额叶皮层 (dmPFC) 和前端岛 (AI) 的活动与等待决策联系起来.
- 缺乏证明这些地区需要适应性等待的因果证据.
研究的目的:
- 为vmPFC,dmPFC和AI在愿意等待任务中的作用提供因果证据.
- 调查前额叶病变如何影响适应性校准等待时间以获得金钱奖励的能力.
主要方法:
- 对28名前额叶病变患者 (20名女性,8名男性) 进行了等待意愿任务.
- 分析了行为表现,重点关注整体等待时间和适应环境变化的校准.
- 计算建模用于估计任务性能参数并解释行为差异.
主要成果:
- 患有vmPFC病变的参与者显示整体等待时间减少.
- 患有dmPFC或AI病变的参与者在校准等待持续时间与环境需求方面表现出特定的损害.
- 计算模型参数估计系统地解释了观察到的行为缺陷.
结论:
- vmPFC对于整体评估等待奖励至关重要.
- 基于环境背景,dmPFC和AI对于动态调整等待行为至关重要.
- 这些发现突出了不同前额叶皮层子区域对不确定性下决策的独特贡献.
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