Insula reactivity and connectivity to anterior cingulate cortex when processing threat in generalized social anxiety disorder.

Insula reactivity and connectivity to anterior cingulate cortex when processing threat in generalized social anxiety disorder.
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DOI:
10.1016/j.biopsycho.2011.10.010
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发表时间:
2012-01
影响因子:
2.6
通讯作者:
Phana, K. Luan
Phana, K. Luan
中科院分区:
医学3区
文献类型:
--
作者:
Klumpp, Heide;Angstadt, Mike;Phana, K. Luan

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在广泛性社交焦虑症(GSAD)中,异常的皮质下-前额叶连接可能导致脑岛对威胁的高反应性。一种新的心理生理学相互作用(PPI)分析被用来检测GSAD患者和健康对照组(HCS)脑岛和前额叶皮质之间的功能性“耦合”。在功能磁共振成像期间,29名GSAD志愿者和26名HC志愿者完成了一项情绪面孔匹配任务,涉及处理恐惧、愤怒和快乐的表情。正如预期的那样,与HCS相比,GSAD患者表现出更大的双侧前岛(ANS)反应性,因为恐惧与快乐的面孔;这一组差异在愤怒的面孔与快乐的面孔之间不那么明显。处理恐惧面孔时脑岛连通性的PPI显示,GSAD组与HCS组相比,右侧内侧-背侧前扣带连接较少。研究结果表明,与对照组相比,GSAD患者对恐惧面孔的高反应性涉及与认知控制和情绪调节有关的前额叶区域连接性降低。
Aberrant subcortical-prefrontal connectivity may contribute to insula hyper-reactivity to threat in generalized social anxiety disorder (gSAD). A novel PsychoPhysiological Interaction (PPI) analysis was used to examine functional ‘coupling’ between the insula and prefrontal cortex in gSAD patients and healthy controls (HCs). During fMRI, 29 gSAD and 26 HC volunteers performed an Emotional Face Matching Task, involving the processing of fear, angry, and happy expressions. As expected, compared with HCs, gSAD patients exhibited greater bilateral anterior insula (aINS) reactivity for fear vs. happy faces; this group difference was less robust for angry vs. happy faces. PPI of insula connectivity when processing fearful faces revealed the gSAD group had less right aINS-dorsal anterior cingulate coupling compared to HCs. Findings indicate that aINS hyper-reactivity for fear faces in gSAD, compared to controls, involves reduced connectivity with a prefrontal region implicated in cognitive control and emotion regulation.
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