人类内分钟和日长对象值记忆的皮层和皮下基质
Sepideh Farmani1, Kiomars Sharifi1,2, Ali Ghazizadeh1,2
1School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran 19395-5746, Iran.
Cerebral cortex (New York, N.Y. : 1991)
|January 20, 2024
概括
人类对物体的价值记忆在大脑中被跟踪,前额和部区域显示出初始的歧视,随着时间的推移转向持续的头顶和皮质下激活.
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
背景情况:
- 人类的决策往往是由追求有价值的物体所驱动的.
- 了解对象价值记忆的大脑机制至关重要,但不完整.
- 以前的研究还没有完全阐明对象价值神经表示的时间动态.
研究的目的:
- 为了研究长时间对物体的人类价值记忆的神经基础.
- 为了检查与对象价值相关的大脑活动如何从训练后立即改变到几天后.
- 识别参与长期存储和检索对象价值信息的大脑区域.
主要方法:
- 用全脑功能磁共振成像 (fMRI) 来测量大脑活动.
- 参与者在不同的时间点被动地观看物体:在价值训练之前,几分钟后和1 - 70天后.
- 休息状态功能连接分析被用来评估激活的大脑区域的网络特性.
主要成果:
- 行为价值记忆在几天内出现下降,但神经相关性仍然存在.
- 在训练后立即,头部,腹部部,间和前部区域表现出强烈的价值歧视.
- 训练后的几天,额头,部和部激活减少,而部区域显示持续活动;皮下区域 (尾部,腹部条纹体,丘脑) 出现了值反应.
- 在皮下区域观察到功能连接性,带状激活与长期记忆性能正相关.
结论:
- 对象价值的神经表征随着时间的推移而演变,从最初的广泛歧视转变为持续的头顶和皮层下参与.
- 这些发现突出了价值记忆的动态神经基础,涉及皮层和皮下结构.
- 这项研究提供了对物体习惯形成的见解,并为基于价值的决策进行跨种类比较提供了基础.
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