注意缺陷多动障碍儿童静息态功能磁共振比率低频振幅的研究
Chinese Journal of Behavioral Medicine and Brain Science(2010)
Abstract
目的 使用静息态功能磁共振(fMRI)比率低频振幅(fALFF)测量技术,从能量的角度对注意缺陷多动障碍(ADHD)儿童与正常儿童进行比较分析,探讨ADHD儿童执行控制脑功能失调病理机制.方法 分别对30例学龄期ADHD儿童与30名性别、年龄、受教育程度均相匹配的正常儿童进行静息态fMRI扫描,采用比率低频振幅算法作为指标进行比较分析.结果 同正常组比较,fALFF值降低区:双侧额上回(BA10,t=5.40,4.11,Z=4.81,3.82),双侧额中回(BA9,BA46,t=5.72,5.37,Z=5.04,3.08),右侧额内侧回(BA10,t=5.53,Z=4.90),左楔叶(t=3.81,Z=3.57);fALFF值升高区:双侧边缘叶(BA36,t=4.37,5.20,Z=4.02,4.66),右侧脑干(t=4.77,Z=4.34),双侧小脑(t=4.65,4.83,Z=4.24,4.38).结论 研究提示在静息状态下前额叶的激活降低,其调控的执行控制功能缺陷是ADHD的核心缺陷.在一些脑区表现的高激活区,可能与ADHD执行控制脑功能失调代偿作用有关.
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Key words
Attention deficit disorder with hyperactivity,Functional magnetic resonance imaging,Resting state,Fractional amplitude of low frequency fluctuation
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