Sex differences in alcohol's effects on fronto-amygdalar functional connectivity during processing of emotional stimuli

被引:0
作者
Mckenna, Benjamin S. [1 ,2 ,3 ]
Anthenelli, Robert M. [1 ]
Schuckit, Marc A. [1 ]
机构
[1] Univ Calif San Diego, Dept Psychiat, Hlth Sci, La Jolla, CA USA
[2] VA San Diego Healthcare Syst, San Diego, CA USA
[3] Univ Calif San Diego, Pacific Treatment & Res Ctr, 3252 Holiday Court,Suite 200, La Jolla, CA 92037 USA
来源
ALCOHOL-CLINICAL AND EXPERIMENTAL RESEARCH | 2024年 / 48卷 / 04期
关键词
alcohol; facial expressions; fMRI; functional connectivity; sex differences; SUBSTANCE USE DISORDERS; PSYCHOPHYSIOLOGICAL INTERACTIONS; GENDER-DIFFERENCES; SOCIAL COGNITION; HIGH-RISK; DEPENDENCE; BRAIN; METAANALYSIS; ACTIVATION; REACTIVITY;
D O I
10.1111/acer.15279
中图分类号
R194 [卫生标准、卫生检查、医药管理];
学科分类号
摘要
BackgroundAmygdala function underlying emotion processing has been shown to vary with an individuals' biological sex. Expanding upon functional magnetic resonance imaging (fMRI) findings reported previously where a low level of response was the focus, we examined alcohol and sex effects on functional connectivity between the amygdala and other brain regions. The central hypothesis predicted that sex would influence alcohol's effects on frontal-limbic functional circuits underlying the processing of negative and positive facial emotions.MethodsSecondary analyses were conducted on data from a double-blind, placebo controlled, within-subjects, cross-over study in 54 sex-matched pairs (N = 108) of 18- to 25-year-old individuals without an alcohol use disorder at baseline. Participants performed an emotional faces fMRI processing task after placebo or approximately 0.7 mL/kg of ethanol. Psychophysiological interaction analyses examined functional connectivity between the amygdala with other brain regions.ResultsThere were significant alcohol-by-sex interactions when processing negatively valenced faces. Whereas intoxicated men exhibited decreased functional connectivity between the amygdala and ventral and dorsal anterior cingulate, angular gyrus, and middle frontal gyrus connectivity was increased in intoxicated women. There was also a main sex effect where women exhibited less functional connectivity in the middle insula than men regardless of whether they received alcohol or placebo. For happy faces, main effects of both sex and alcohol were observed. Women exhibited less amygdala functional connectivity in the right inferior frontal gyrus than men. Both men and women exhibited greater functional connectivity in the superior frontal gyrus in response to alcohol than placebo.ConclusionsAlcohol's effects on amygdala functional circuits that underlying emotional processing vary by sex. Women had higher functional connectivity than men following exposure to a moderate dose of alcohol which could indicate that women are better than men at processing affectively laden stimuli when intoxicated.
引用
收藏
页码:612 / 622
页数:11
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