UCL Institute of Cognitive Neuroscience, UK; UCL Experimental Psychology, UK.
UCL Institute of Cognitive Neuroscience, UK; UCL Clinical, Educational and Health Psychology, UK.
Neuropsychologia. 2022 May 3;169:108194. doi: 10.1016/j.neuropsychologia.2022.108194. Epub 2022 Mar 1.
Rodent and human studies have implicated an amygdala-prefrontal circuit during threat processing. One possibility is that while amygdala activity underlies core features of anxiety (e.g. detection of salient information), prefrontal cortices (i.e. dorsomedial prefrontal/anterior cingulate cortex) entrain its responsiveness. To date, this has been established in tightly controlled paradigms (predominantly using static face perception tasks) but has not been extended to more naturalistic settings. Consequently, using 'movie fMRI'-in which participants watch ecologically-rich movie stimuli rather than constrained cognitive tasks-we sought to test whether individual differences in anxiety correlate with the degree of face-dependent amygdala-prefrontal coupling in two independent samples. Analyses suggested increased face-dependent superior parietal activation and decreased speech-dependent auditory cortex activation as a function of anxiety. However, we failed to find evidence for anxiety-dependent connectivity, neither in our stimulus-dependent or -independent analyses. Our findings suggest that work using experimentally constrained tasks may not replicate in more ecologically valid settings and, moreover, highlight the importance of testing the generalizability of neuroimaging findings outside of the original context.
啮齿动物和人类研究表明,在威胁处理过程中存在杏仁核-前额叶回路。一种可能性是,虽然杏仁核活动是焦虑的核心特征(例如,检测显著信息)的基础,但前额叶皮层(即背内侧前额叶/前扣带皮层)使其反应具有节律性。迄今为止,这已在严格控制的范式中得到证实(主要使用静态面部感知任务),但尚未扩展到更自然的环境中。因此,我们使用“电影 fMRI”-参与者观看富有生态的电影刺激,而不是受限制的认知任务-旨在测试在两个独立样本中,焦虑的个体差异是否与面孔依赖的杏仁核-前额叶耦合程度相关。分析表明,随着焦虑程度的增加,依赖于面孔的顶叶激活增加,而依赖于言语的听觉皮层激活减少。然而,我们既没有在我们的刺激依赖或非刺激依赖分析中找到焦虑依赖的连通性的证据。我们的研究结果表明,使用实验性受限任务的研究可能无法在更具生态有效性的环境中复制,而且,强调了在原始背景之外测试神经影像学发现的普遍性的重要性。