Department of Psychology, State University of New York at Oswego, Oswego, NY 13126, United States; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, United States.
Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, United States.
Drug Alcohol Depend. 2018 Apr 1;185:173-180. doi: 10.1016/j.drugalcdep.2017.11.026. Epub 2018 Feb 7.
Alcohol misuse is associated with dysfunction of the amygdala-prefrontal cortical circuit. The amygdala and its cortical targets show decreased activity during a variety of task challenges in individuals engaged in problem drinking. On the other hand, it is less clear how amygdala resting state functional connectivity (rsFC) may be altered in association with alcohol misuse and whether such changes are restricted to prefrontal cortical structures. Further, the influences of comorbid substance use and depression and potential sex differences have not been assessed in earlier work. Here, with fMRI data from a Nathan Kline Institute/Rockland sample of 83 non-dependent alcohol drinkers (26 men), we addressed changes in whole brain rsFC of the amygdala in association with problem drinking as indexed by an alcohol involvement score. Imaging data were processed with Statistical Parametric Mapping following standard routines and all results were examined at voxel p < 0.001 uncorrected in combination with cluster p < 0.05 corrected for false discovery rate. Alcohol misuse was correlated with decreased amygdala connectivity with the dorsal anterior cingulate cortex (dACC) irrespective of depression and other substance use. Changes in amygdala-dACC connectivity manifested in the latero-basal subdivision of the amygdala. Further, men as compared to women showed a significantly stronger relationship in decreased amygdala-dACC connectivity and problem drinking, although it should be noted that men also showed a trend toward higher alcohol involvement score than women. The findings add to a growing literature documenting disrupted amygdala-prefrontal cortical functions in relation to alcohol misuse.
酒精滥用与杏仁核-前额皮质回路的功能障碍有关。在参与问题饮酒的个体中,各种任务挑战期间,杏仁核及其皮质靶标显示出活动减少。另一方面,尚不清楚与酒精滥用相关的杏仁核静息状态功能连接(rsFC)如何发生变化,以及这些变化是否仅限于前额皮质结构。此外,在早期工作中,尚未评估共病物质使用和抑郁的影响以及潜在的性别差异。在这里,我们使用来自 Nathan Kline Institute/Rockland 的 83 名非依赖酒精饮酒者(26 名男性)的 fMRI 数据,根据酒精参与评分来确定与问题饮酒相关的杏仁核全脑 rsFC 的变化。对成像数据进行了统计参数映射处理,遵循标准程序,所有结果均在未校正的体素 p < 0.001 结合校正后的簇 p < 0.05 进行了检查,以校正虚假发现率。酒精滥用与背侧前扣带皮层(dACC)与杏仁核的连接减少有关,而与抑郁和其他物质使用无关。杏仁核-dACC 连接的变化表现为杏仁核的外侧基底亚区。此外,与女性相比,男性在减少的杏仁核-dACC 连接和问题饮酒方面表现出更强的关系,尽管应该注意的是,与女性相比,男性的酒精参与评分也呈上升趋势。这些发现增加了越来越多的文献,记录了与酒精滥用有关的杏仁核-前额皮质功能障碍。