扩大范围:多个功能连接网络是潜在威胁条件和灭绝的基础
Cody A Cushing1, Yujia Peng1,2,3,4, Zachary Anderson5
1Department of Psychology, University of California Los Angeles, Los Angeles, CA, United States.
威胁学习涉及多个大脑网络,而不仅仅是特定区域. 功能连接分析揭示了在威胁获取和灭绝过程中参与的独特网络,这对于理解焦虑障碍至关重要.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 精神病学是一个精神病学.
背景情况:
- 威胁学习对焦虑和恐惧相关疾病至关重要.
- 以前的研究集中在特定的大脑区域,限制了对整个大脑动态的理解.
- 研究大规模的大脑网络对于理解人类恐惧相关疾病至关重要.
研究的目的:
- 在使用fMRI进行威胁学习时检查全脑功能连接网络.
- 识别参与威胁获取,灭绝和灭绝召回的网络.
- 了解大脑网络在威胁和安全学习中的相互作用.
主要方法:
- 223名参与者通过fMRI进行了为期2天的帕夫洛夫威胁调节范式.
- 使用数据驱动组独立组件分析 (ICA) 来分析功能连接.
- 在威胁获取,灭绝和灭绝召回阶段评估了连接性.
主要成果:
- 一个包括默认模式网络 (海马体,vmPFC,后带肌) 的网络参与了威胁的获取和灭绝.
- 一个突出网络 (dACC,mPFC,下额) 涉及到威胁获取和灭绝回忆.
- 其他网络 ( salience, somatomotor, visual, frontoparietal) 也有助于威胁的获得或灭绝.
结论:
- 威胁学习涉及多个空间独立的大脑网络的协调功能.
- 这些网络并行运行,在不同的时间范围内执行不同的功能.
- 了解这些网络动态对于理解焦虑和恐惧障碍的神经病理学至关重要.
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