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目的通过静息态功能磁共振(functional MRI,fMRI)比率低频振幅(fraction amplitude of low frequency fluctuation,fALFF)方法探讨首发精神分裂症患者认知功能障碍的潜在机制。方法纳入28例首发精神分裂症患者(first-episode schizophrenia,FSZ)和33名年龄、性别、受教育年限相匹配的对照者,用重复性成套神经心理状态测验(repeatable battery for the assessment of neuropsy