Functional connectivity among insula, sensory and social brain regions in boys with autism spectrum disorder
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摘要:
目的 探究孤独症谱系障碍(autism spectrum disorder, ASD)男童脑岛与感觉、社交相关脑区功能连接特征,为探索ASD男童感觉异常影响核心症状的中枢神经基础提供基础资料。 方法 收集在黑龙江省孤独症定点康复机构进行训练的34例ASD男童与29例幼儿园健康对照(TD组)男童的静息态功能磁共振数据,基于功能连接分析方法,以感觉相关脑区、脑岛、社交相关脑区为种子点,比较两组被试种子点间的功能连接(FC)水平的差异,结果经FDR校正。采用孤独症诊断观察量表(ADOS)、儿童孤独症评定量表(CARS)、孤独症特质量表-儿童版(AQ-Child)评估ASD男童的核心表型。 结果 与TD组相比,ASD组男童触觉、嗅觉和听觉脑区与脑岛之间的FC水平升高;脑岛与双侧杏仁核、内侧前额叶皮质(mPFC)之间的FC水平升高(P值均 < 0.05)。Pearson相关性分析表明,ASD组听觉脑区(BA42)与左侧脑岛FC值与ADOS的沟通(r=-0.44)、相互性社会互动(r=-0.43)、沟通和社会互动总分(r=-0.49)、AQ-Child的细节关注(r=-0.41)得分均呈负相关;右侧脑岛与右侧杏仁核FC值与AQ-Child的注意力转移得分均呈正相关(r=0.38),右侧脑岛与mPFC间的FC值与ADOS的刻板行为和局限兴趣(r=0.48)、AQ-Child的注意力转移(r=0.49)、AQ-Child总分(r=0.41)、CARS总分(r=0.41)均呈正相关(P值均 < 0.05)。 结论 ASD儿童脑岛与感觉、社交相关脑区功能连接存在异常,且与临床症状相关,可开展深入研究,探索其中枢神经机制。 Abstract:Objective To identify the functional connectivity characteristics of insula, sensory and social related brain regions in boys with autism spectrum disorder(ASD), to explore the central nervous basis of sensory abnormality affecting core symptoms in boys with ASD. Methods Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from 34 boys with ASD and 29 typical development boys (TD group). Based on functional connectivity analysis, the sensory-related brain regions, insula, and social-related brain regions were taken as regions of interest to calculate the functional connectivity (FC) level between the regions of interest, the differences between the two groups were compared and the results were corrected by FDR. The Autism Diagnostic Observation Schedule (ADOS), Childhood Autism Rating Scale (CARS) and Autism Spectrum Quotient-Children's Version (AQ-Child) were used to assess the core phenotypes of boys with ASD. Results Compared with the TD group, the levels of FC between tactile brain regions and insula, olfactory brain regions and insula, auditory brain regions and insula in boys with ASD group were significantly increased. The level of FC between the insula and bilateral amygdala, insula and the medial prefrontal cortex(mPFC) were significantly increased(P < 0.05).Pearson correlation analysis showed that the level of FC between auditory brain region(BA42)and left insula in ASD group was negatively correlated with the scores of communication subscale of ADOS(r=-0.44), social interaction subscale of ADOS(r=-0.43), communication & social interaction subscale of ADOS(r=-0.49), attention to details subscale of AQ-Child(r=-0.41). The level of FC between the right insula and right amygdala was positively correlated with the attention switch subscale of AQ-Child(r=0.38), the level of FC between right insula and mPFC was positively correlated with the scores of repetitive behavior subscale of ADOS(r=0.48), the attention switch subscale of AQ-Child(r=0.49), total scale subscale of AQ-Child(r=0.41), total scale of CARS(r=0.41)(P < 0.05). Conclusion The levels of FC between insula and sensory-related, social-related brain regions are abnormal in children with ASD, which have significant correlations with clinical symptoms. In-depth studies can be conducted to explore underlying neutral mechanisms. -
Key words:
- Autistic disorder /
- Brain /
- Sensation /
- Child /
- Male
1) 利益冲突声明 所有作者声明无利益冲突。 -
表 1 用于功能连接分析的种子点
Table 1. Regions of interest for functional connectivity analysis
脑区 种子点 英文缩写 触觉脑区 ROI1 BA1 ROI2 BA2 ROI3 BA3 视觉脑区 ROI4 BA17 ROI5 BA18 ROI6 BA19 听觉脑区 ROI7 BA22 ROI8 BA41 ROI9 BA42 嗅觉脑区 ROI10 BA34 脑岛 ROI11 INS_L ROI12 INS_R 杏仁核 ROI13 AMY_L 内侧前额叶皮质 ROI14 AMY_R ROI15 mPFC 注:BA为布罗德曼分区;INS_L为左侧脑岛;INS_R为右侧脑岛;AMY_L为左侧杏仁核;AMY_R为右侧杏仁核;mPFC为内侧前额叶皮质。 表 2 ASD组与TD组儿童感觉、脑岛和社交脑区之间功能连接差异比较(x±s)
Table 2. Brain regions with different functional connections between sensory, insula and social brain regions in ASD and TD groups (x±s)
组别 人数 感觉-脑岛 脑岛-社交 BA2- INS_L BA34-INS_R BA42-INS_L INS_R-AMY_L INS_R-AMY_R INS_R-mPFC ASD组 34 2.37±2.33 5.33±2.54 4.20±2.54 4.45±2.62 6.71±2.65 0.86±2.40 TD组 29 0.42±2.93 2.76±2.76 1.99±2.93 1.59±3.10 4.62±2.39 -1.14±2.48 t值 2.95 3.85 3.20 3.97 3.27 3.25 P值 < 0.05 < 0.01 0.03 < 0.01 0.03 0.03 注:BA为布罗德曼分区;INS_L为左侧脑岛;INS_R为右侧脑岛;AMY_L为左侧杏仁核;AMY_R为右侧杏仁核;mPFC为内侧前额叶皮质。 表 3 ASD组男童FC值与孤独症临床评估结果相关系数(r值,n=34)
Table 3. Correlation analysis between FC values of boys with ASD group and autism behavior evaluation results(r, n=34)
量表 维度 BA42-INS_L INS_R-AMY_R INS_R-mPFC ADOS 沟通 -0.44* -0.26 0.28 社会互动 -0.43* 0.05 0.29 沟通和社会互动 -0.49** -0.10 0.32 刻板行为和局限兴趣 -0.31 -0.16 0.48** AQ-Child 社会技能 0.12 0.05 0.21 注意力转移 0.07 0.38* 0.49** 细节关注 -0.41* -0.28 0.09 沟通能力 -0.08 0.07 0.24 想象能力 -0.18 0.01 0.34 总分 -0.12 0.05 0.41* CARS 总分 -0.10 0.05 0.41* 注:*P < 0.05,**P < 0.01。BA为布罗德曼分区;INS_L为左侧脑岛;INS_R为右侧脑岛;AMY_R为右侧杏仁核;mPFC为内侧前额叶皮质。 -
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