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首页> 外文期刊>Psychiatry Research. Neuroimaging >Reduced brain activation in euthymic bipolar patients during response inhibition: An event-related fMRI study
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Reduced brain activation in euthymic bipolar patients during response inhibition: An event-related fMRI study

机译:事件抑制功能磁共振成像研究显示,在抑制反应过程中,正常人双相情感障碍患者的大脑活化降低

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Deficits in inhibitory control have been reported in euthymic bipolar disorder patients. To date, data on the neuroanatomical correlates of these deficits are exclusively related to cognitive inhibition. This study aimed to examine the neural substrates of motor inhibitory control in euthymic bipolar patients. Groups of 20 patients with euthymic bipolar disorder and 20 demographically matched healthy subjects underwent event-related functional magnetic resonance imaging while performing a Go-NoGo task. Between-group differences in brain activation associated with motor response inhibition were assessed by using random-effects analyses. Although euthymic bipolar patients and healthy subjects performed similarly on the Go-NoGo task, they showed different patterns of brain activation associated with response inhibition. Specifically, patients exhibited significantly decreased activation in the left frontopolar cortex and bilateral dorsal amygdala compared with healthy subjects. There were no brain regions that were significantly more activated in patients than in healthy subjects. The findings suggest that euthymic bipolar patients have deficits in their ability to engage the left frontopolar cortex and bilateral dorsal amygdala during response inhibition. Further research should ascertain the role that such deficits may play in the emergence of impulsive behaviors that characterize bipolar disorder.
机译:据报道,在正常人双相情感障碍患者中,抑制性控制的不足。迄今为止,关于这些缺陷的神经解剖学相关数据仅与认知抑制有关。这项研究旨在检查正常人双相情感障碍患者的运动抑制控制的神经底物。在执行Go-NoGo任务时,对20名患有正常性双相情感障碍的患者和20位人口统计学匹配的健康受试者进行了事件相关的功能磁共振成像。使用随机效应分析评估与运动反应抑制相关的大脑激活的组间差异。尽管正常人双相情感障碍患者和健康受试者在执行Go-NoGo任务时表现相似,但他们显示出与反应抑制相关的不同形式的大脑激活模式。具体而言,与健康受试者相比,患者在左额极皮层和双侧背杏仁核中的激活明显降低。没有患者的大脑区域比健康受试者的大脑区域激活得多。研究结果表明,在反应抑制过程中,常态双相情感障碍患者参与左额极皮质和双侧背杏仁核的能力存在缺陷。进一步的研究应确定这种缺陷在双相情感障碍特征性冲动行为的出现中可能发挥的作用。

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