摘要
目的 探讨精神分裂症患者在静息状态下脑活动局部一致性(ReHo)特点.方法 对104例首次发病未服药精神分裂症患者(病例组)和104名健康对照者(对照组)进行静息态脑fMRI扫描,利用ReHo的方法分析数据并进行组间比较.采用偏相关分析功能活动异常脑区ReHo值与PANSS各因子间的相关性.结果 与对照组相比,病例组ReHo降低的区域位于右侧前额叶眶额皮质(ReHo值:0.7±0.1,t=-3.502,P<0.05)及背外侧皮质(ReHo值:1.0±0.1,t=-4.613,P<0.05)、左侧前额叶眶额皮质(ReHo值:0.8±0.1,t=-4.778,P<0.05)、后扣带回/楔前叶(ReHo值:1.2±0.1,t=-3.838,P<0.05)、右侧顶下小叶(ReHo值:1.1±0.1,t=-4.275,P<0.05)和右侧中央后回(ReHo值:0.9±0.1,t=-3.520,P<0.05).ReHo增高的区域位于左侧小脑前叶(ReHo值:1.1±0.1,=4.081,P<0.05)和后叶(ReHo值:1.0±0.1,t=3.660,P<0.05)、右侧小脑后叶(ReHo值:0.8±0.1,t=3.359,P<0.05)、以舌回为中心的左侧枕叶(ReHo值:0.7±0.1,t =3.986,P<0.05)和右侧枕叶(ReHo值:1.1±0.1,t=3.362,P<0.05),左侧颞上回/颞中回(ReHo值:1.1±0.1,=3.708,P <0.05)、左侧壳核/豆状核(ReHo值:1.0±0.1,t=4.457,P<0.05).病例组右侧中央后回ReHo与阴性症状因子(r=-0.262,P<0.01)、瓦解性症状因子(r=-0.219,P<0.01)相关,右侧前额叶眶额皮质的ReHo与退缩性因子相关(r=-0.242,P <0.01).结论 精神分裂症患者静息状态下的脑功能活动ReHo异常广泛分布,功能活动异常的脑区大多位于功能网络的节点脑区,可能与精神分裂症的病理机制有关.
Objective To explore the regional homogeneity (ReHo) of resting state brain activity in schizophrenia by using functional magnetic resonance imaging (fMRI).Methods One hundred and four first-episode treatment-naive schizophrenia (FES) patients,and 104 age/gender/education-matched healthy controls were examined by fMRI scans.ReHo of the resting-state brain activity was compared between the two groups.Relationships between abnormal ReHo of brain activity and clinical symptoms in patients were evaluated by partial correlation analysis.Results Compared with controls,FES patients showed significantly decreased regional homogeneity in right orbitofrontal cortex (ReHo:0.7 ± 0.1,t =-3.502,P < 0.05),right dorsolateral prefrontal cortex (ReHo:1.0 ± 0.1,t =-4.613,P < 0.05),left orbitofrontal cortex (ReHo:0.8 ± 0.1,t =-4.778,P < 0.05),posterior cingulate cortex and precuneus (ReHo:1.2 ± 0.1,t =-3.838,P < 0.05),the right lateral parietal cortex (ReHo:1.1 ± 0.1,t =-4.275,P < 0.05) and postcentral gyrus (ReHo:0.9 ± 0.1,t =-3.520,P < 0.05) ; the FES patients also showed increased ReHo in left anterior (ReHo:1.1 ±0.1,t =4.081,P <0.05) and posterior (ReHo:1.0 ±0.1,t =3.660,P < 0.05) cerebellar lobe,right posterior cerebellar lobe (ReHo:0.8 ± 0.1,t =3.359,P <0.05),left (ReHo:0.7 ± 0.1,t =3.986,P < 0.05) and right (ReHo:1.1 ± 0.1,t =3.362,P < 0.05) occipital lobe,left superior and middle temporal gyrus (ReHo:1.1 ± 0.1,t =3.708,P < 0.05),left putamen/lentiform nucleus (ReHo:1.0 ± 0.1,t =4.457,P < 0.05).In patients,decreased ReHo in postcentral gyrus was correlated with negative symptoms (r =-0.262,P < 0.01) and disorganization symptoms (r =-0.219,P < 0.01),decreased ReHo in right orbitofrontal cortex was correlated with withdrawal symptoms (r =-0.242,P < 0.01) in schizophrenia.Conclusions Our results indicate that abnormal ReHo of resting-state brain activity may be widely distributed in schizophrenia.The brain regions described above may be involve in the psychopathology and pathophysiology of schizophrenia.
出处
《中华精神科杂志》
CAS
CSCD
北大核心
2014年第5期281-287,共7页
Chinese Journal of Psychiatry
基金
国家自然科学基金资助项目(81130024)
国家科技部“十二五”支撑计划项目(2012BAI01B06)
关键词
精神分裂症
磁共振成像
局部一致性
Schizophrenia
Magnetic resonance imaging
Regional homogeneity