Department of Radiology, The Ohio State University College of Medicine, Columbus, OH, USA.
Psychiatry Res. 2011 Apr 30;192(1):12-9. doi: 10.1016/j.pscychresns.2010.11.005. Epub 2011 Mar 3.
Only recently have investigations of the relationship between media violence exposure (MVE) and aggressive behavior focused on brain functioning. In this study, we examined the relationship between brain activation and history of media violence exposure in adolescents, using functional magnetic resonance imaging (fMRI). Samples of adolescents with no psychiatric diagnosis or with disruptive behavior disorder (DBD) with aggression were compared to investigate whether the association of MVE history and brain activation is moderated by aggressive behavior/personality. Twenty-two adolescents with a history of aggressive behavior and diagnosis of either conduct disorder or oppositional-defiant disorder (DBD sample) and 22 controls completed an emotional Stroop task during fMRI. Primary imaging results indicated that controls with a history of low MVE demonstrated greater activity in the right inferior frontal gyrus and rostral anterior cingulate during the violent word condition. In contrast, in adolescents with DBD, those with high MVE exhibited decreased activation in the right amygdala, compared with those with low MVE. These findings are consistent with research demonstrating the importance of fronto-limbic structures for processing emotional stimuli, and with research suggesting that media violence may affect individuals in different ways depending on the presence of aggressive traits.
直到最近，对媒体暴力接触（MVE）与攻击行为之间关系的研究才开始关注大脑功能。在这项研究中，我们使用功能磁共振成像（fMRI）来研究青少年的大脑激活与媒体暴力接触史之间的关系。我们比较了没有精神科诊断或具有攻击性的破坏性行为障碍（DBD）的青少年样本，以调查 MVE 史与大脑激活之间的关联是否受到攻击性/个性的调节。22 名有攻击性行为史且被诊断为品行障碍或对立违抗性障碍（DBD 样本）的青少年和 22 名对照者在 fMRI 期间完成了情绪 Stroop 任务。主要成像结果表明，低 MVE 史的对照组在暴力词条件下右侧额下回和前扣带回的活动增加。相比之下，在 DBD 青少年中，高 MVE 者的右侧杏仁核激活程度低于低 MVE 者。这些发现与研究一致，这些研究表明，额叶边缘结构对于处理情绪刺激很重要，并且表明，根据攻击性特征的存在，媒体暴力可能会以不同的方式影响个体。
