Department of Psychiatry, Yale University, New Haven, CT, USA.
Alcohol. 2010 Feb;44(1):111-7. doi: 10.1016/j.alcohol.2009.09.032.
Binge alcohol use is common among teenagers with 28% of 12th graders reporting getting drunk in the past month. Chronic heavy drinking has been associated with verbal learning and memory deficits in adolescents and adults, yet verbal encoding in less frequently drinking teens has not yet been studied. Here, we examined functional magnetic resonance imaging (fMRI) response during verbal encoding among adolescent binge drinkers. Participants recruited from local high schools were of ages 16-18 and consisted of 12 binge drinkers and 12 demographically similar nondrinkers. Participants were all nonsmokers, and drinkers were abstinent from alcohol for an average of 33 days at the time of scanning. Participants performed a verbal paired associates learning task during fMRI acquisition. Drinkers recalled marginally fewer words than nondrinkers (P=.07). Compared with nondrinkers, bingers showed more response in right superior frontal and bilateral posterior parietal cortices but less response in occipital cortex during novel encoding (Ps<.05, clusters >1,512microL). In addition, controls showed significant activation in the left hippocampus during novel encoding, whereas binge drinkers did not. Adolescent binge drinkers demonstrated (1) more response than nondrinkers in frontal and parietal regions, which could suggest greater engagement of working memory systems during encoding; (2) no hippocampal activation to novel word pairs; and (3) slightly poorer word pair recall, which could indicate disadvantaged processing of novel verbal information and a slower learning slope. Longitudinal studies will be needed to ascertain the degree to which emergence of binge drinking is linked temporally to these brain response patterns.
青少年中 binge alcohol use 很常见,有 28%的 12 年级学生报告在过去一个月中喝醉过。慢性重度饮酒与青少年和成年人的言语学习和记忆缺陷有关,但较少饮酒的青少年的言语编码尚未得到研究。在这里,我们研究了青少年 binge drinker 在言语编码期间的功能磁共振成像(fMRI)反应。从当地高中招募的参与者年龄在 16-18 岁之间,包括 12 名 binge drinker 和 12 名在人口统计学上相似的不饮酒者。所有参与者都是不吸烟者,饮酒者在扫描时平均戒酒 33 天。参与者在 fMRI 采集期间执行了言语配对联想学习任务。与不饮酒者相比,饮酒者回忆的单词略少(P=.07)。与不饮酒者相比,bingers 在新颖性编码期间右侧额上回和双侧顶后回的反应更多,但在枕叶皮质的反应更少(P<.05,簇>1,512microL)。此外,对照组在新颖性编码期间左侧海马体有明显的激活,而 binge drinkers 则没有。青少年 binge drinker 表现出(1)在额叶和顶叶区域的反应多于不饮酒者,这可能表明在编码过程中工作记忆系统的参与度更高;(2)对新的单词对没有海马体激活;(3)对单词对的回忆略差,这可能表明新的言语信息处理处于不利地位,学习斜率较慢。需要进行纵向研究,以确定 binge drinking 的出现与这些大脑反应模式在时间上的关联程度。