Vander Wyk Brent C, Hoffman Ferdinand, Pelphrey Kevin A
Yale University, 230 South Frontage Road, New Haven, CT 06520, USA.
Max Planck Institute for Human Cognitive and Brain Sciences, P.O. Box 500355, 04303 Leipzig, Germany.
Dev Cogn Neurosci. 2014 Apr;8:121-30. doi: 10.1016/j.dcn.2013.08.001. Epub 2013 Aug 21.
Previous research has noted disrupted patterns of neural activation during emotion, processing in individuals with autism spectrum disorders (ASD). However, prior research relied on, designs that may place greater cognitive load on individuals with ASD. In order to address this issue, we adapted the fMRI task of Ochsner et al. (2004a) for children by, presenting fewer stimuli, with fewer valence levels, and longer stimuli duration. A localizer sample of, typically developing children (n=26) was used to construct regions of interest involved in emotional, processing. Activations in these regions during self- and other-referential emotion processing was, compared in age, IQ, gender matched groups (n=17 ASD, n=16 TD). Matched samples replicate, condition contrasts of the localizer, but no group differences were found in behavior measures or, neural activation. An exploratory functional connectivity analysis in a subset of the matched groups, also did not detect striking differences between the groups. These findings suggest that disruptions in activation in emotion processing neural networks in ASD is partially a function of task related cognitive load.
先前的研究已经指出,自闭症谱系障碍(ASD)个体在情绪处理过程中存在神经激活模式紊乱的情况。然而,先前的研究依赖于可能会给ASD个体带来更大认知负荷的设计。为了解决这个问题,我们通过呈现更少的刺激、更少的效价水平和更长的刺激持续时间,对Ochsner等人(2004a)的功能磁共振成像任务进行了调整,以适用于儿童。使用一组典型发育儿童(n = 26)的定位样本构建与情绪处理相关的感兴趣区域。在年龄、智商、性别匹配的组(n = 17名ASD儿童,n = 16名发育正常儿童)中,比较了自我参照和他人参照情绪处理过程中这些区域的激活情况。匹配样本重复了定位样本的条件对比,但在行为测量或神经激活方面未发现组间差异。在匹配组的一个子集中进行的探索性功能连接分析,也未检测到两组之间存在显著差异。这些发现表明,ASD中情绪处理神经网络激活的紊乱部分是与任务相关的认知负荷的作用。