Location-dependent threat and associated neural abnormalities in clinical anxiety.

Location-dependent threat and associated neural abnormalities in clinical anxiety.
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DOI:
10.1038/s42003-021-02775-x
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发表时间:
2021-11-04
影响因子:
5.9
通讯作者:
Ernst M
Ernst M
中科院分区:
生物学2区
文献类型:
--
作者:
Suarez-Jimenez B;Balderston NL;Bisby JA;Leshin J;Hsiung A;King JA;Pine DS;Burgess N;Grillon C;Ernst M

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焦虑症的特征是对远端或不确定威胁的适应不良防御反应。阐明焦虑的神经机制对于理解焦虑障碍的发展和维持至关重要。在功能磁共振成像中,病理性焦虑患者(ANX,n = 23)和健康对照组(HC,n = 28)完成了一个情境威胁学习范例,在这个范例中,他们在一个虚拟环境中摘花,这个虚拟环境包括一个危险区和一个安全区,在这个危险区中,鲜花与休克配对。与HC相比,ANX显示1)任务期间腹内侧前额叶皮层和前海马激活减少,特别是在安全区,2)任务期间腹内侧和背内侧前额叶皮层激活增加,特别是在危险区,3)在潜在电击传递之前,危险区杏仁核和中脑/导水管周围灰质激活增加。研究结果表明,ANX从事不同的大脑区域,以调节上下文适当的情绪反应时,学习区分线索的环境。Suarez-Jimenez及其同事使用功能磁共振成像的休克和安全区实验来研究病理性焦虑症如何在大脑中表现出来。他们的发现表明,实验中的安全区和危险区会改变不同大脑区域的激活。
Anxiety disorders are characterized by maladaptive defensive responses to distal or uncertain threats. Elucidating neural mechanisms of anxiety is essential to understand the development and maintenance of anxiety disorders. In fMRI, patients with pathological anxiety (ANX, n = 23) and healthy controls (HC, n = 28) completed a contextual threat learning paradigm in which they picked flowers in a virtual environment comprising a danger zone in which flowers were paired with shock and a safe zone (no shock). ANX compared with HC showed 1) decreased ventromedial prefrontal cortex and anterior hippocampus activation during the task, particularly in the safe zone, 2) increased insula and dorsomedial prefrontal cortex activation during the task, particularly in the danger zone, and 3) increased amygdala and midbrain/periaqueductal gray activation in the danger zone prior to potential shock delivery. Findings suggest that ANX engage brain areas differently to modulate context-appropriate emotional responses when learning to discriminate cues within an environment. Suarez-Jimenez and colleagues use a shock and safe zone experiment with fMRI imaging to examine how pathological anxiety disorders are manifested in the brain. Their findings suggest that safe and dangerous zones within the experiment alter activation in different brain regions.
在大鼠和人类中持续的恐惧:恐惧与焦虑中的杏仁核的作用。
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