交联的TMS/fMRI显示,威胁降低了dlPFC介导的情绪处理的上下调节
Milan Patel1, Marta Teferi1, Hannah Gura1
1Center for Neuromodulation in Depression and Stress Department of Psychiatry University of Pennsylvania Philadelphia, Philadelphia, PA, USA.
NPP - digital psychiatry and neuroscience
|December 8, 2025
概括
背侧前额皮质 (dlPFC) 可能通过减少参与情绪表达的大脑区域的活动来调节焦虑. 这种自上而下的控制效应在受到威胁时会减弱,这表明dlPFC.
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
- 情感神经科学是一种神经科学.
背景情况:
- 背侧前额皮质 (dlPFC) 对于认知控制,注意力和工作记忆至关重要.
- 有证据表明dlPFC也参与焦虑调节.
- 在dlPFC中,认知控制和焦虑调节之间的重叠仍然不清楚.
研究的目的:
- 调查dlPFC是否调节与焦虑表达相关的大脑区域.
- 测试dlPFC刺激降低了与焦虑相关的大脑区域的活动的假设.
主要方法:
- 采用了交联式跨磁刺激 (TMS) 和功能磁共振成像 (fMRI).
- 在中立,可预测和不可预测 (NPU) 威胁任务中记录了TMS唤起的BOLD响应.
- 在44名健康参与者中刺激了正确的dlPFC或对照区域.
主要成果:
- dlPFC刺激在左侧胰岛 (LI),右侧感觉/运动皮质 (RSM) 和双侧补充运动区域 (BSMA) 中引起了差异性的BOLD反应.
- 这些地区在安全时期显示出大量的BOLD停用,而在不可预测的威胁期间,这些停用减少了.
- 研究结果表明,dlPFC活动调节了情绪表达区域的活动,这种效应在受到威胁时不那么明显.
结论:
- dlPFC在情绪的自上而下的控制中起作用.
- dlPFC刺激似乎减少了情绪表达区域的下游活动.
- 在受到威胁的时期,这种监管效应会减弱.
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