fMRI responses to emotional faces in children and adolescents at genetic risk for psychiatric illness share some of the features of depression

被引:13
作者
Barbour, Tracy [1 ]
Pruitt, Patrick [1 ]
Diwadkar, Vaibhav A. [1 ]
机构
[1] Wayne State Univ, Sch Med, Dept Psychiat & Behav Neurosci, Div Brain Res & Imaging Neurosci,SOM, Detroit, MI 48201 USA
关键词
Adolescence; fMRI; Risk; Negative symptoms; Social reward; SUBGENUAL PREFRONTAL CORTEX; ULTRA-HIGH-RISK; NEGATIVE SYMPTOMS; FACIAL EXPRESSIONS; NEURAL RESPONSES; BIPOLAR DISORDER; HYPO-ACTIVATION; WORKING-MEMORY; SCHIZOPHRENIA; REWARD;
D O I
10.1016/j.jad.2011.11.036
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Background: Fronto-limbic regions of the brain including the sub-genual (sgPFC) and medial prefrontal (mPFC) cortices are central to processing emotionally salient and hedonic stimuli (Mayberg, 2009) and implicated in depression. The relevance of cortico-limbic models of emotion and reward processing in children with genetic risk for psychiatric disorders has not been assessed. Methods: Here we studied adolescents at risk for schizophrenia (HRS) and controls (HC) using an event-related fMRI continuous affective appraisal task. HRS were divided into sub-groups based on the presence or absence of negative symptoms (Miller et al., 2003), HRS_NS+ and HRS_NS- respectively. Brain responses to positive, negative and neutral emotional stimuli were estimated. Results: Consistent with observations in the depressive phenotype, for positively valenced stimuli, HRS_NS + (relative to HC and HRS_NS-) were characterized by hypo-responsivity of the sgPFC and the mPFC, but hyper-responsivity of the mid-brain. sgPFC and mPFC signals were coupled across groups. Limitations: Such studies can benefit from larger sample sizes, though our observed effect sizes were in the moderate to large range. Conclusions: Children and adolescents at risk for psychiatric illness and who evince reliably present negative symptoms show brain responses to socially rewarding stimuli similar to those observed in depression. Studies in at-risk children and adolescents may be important in understanding how early manifestations of depression-like characteristics impact brain function. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:276 / 285
页数:10
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