机构地区:[1]中国中医科学院西苑医院放射科,100091北京100091 [2]天津医科大学总医院放射科 [3]承德护理职业学院 [4]天津市安定医院内科
出 处:《中华行为医学与脑科学杂志》2013年第4期321-325,共5页Chinese Journal of Behavioral Medicine and Brain Science
摘 要:目的探讨精神分裂症患者岛叶及其相关网络连接是否存在异常及脑功能连接改变对执行表现的影响。方法采用血氧水平依赖性功能磁共振成像方法,检测14例偏执型精神分裂症患者和16名正常志愿者的脑功能连接,将前额叶内侧皮层(MPFC,BAl0)作为种子点,应用SPM2、AFNI及Matlab软件进行图像数据处理,分别对患者组和正常对照组的2-back任务和静息状态行组内和组间两个水平的统计分析。结果与MPFC正相关和负相关的脑区在静息和任务状态下,患者组功能连接强度及范围总体上低于正常对照组。静息状态下,与MPFC负相关的功能连接脑区在患者组主要包括双颞上回(BA22)、双楔叶(BAl8/19)、双顶下小叶(BA40)、右海马旁回,正常对照组主要包括双岛叶/颞上回(BA22)、双顶下小叶(BA40)、双中央旁小叶、双海马旁回;与MPFC正相关的功能连接脑区患者组主要包括松果体区,对照组主要包括左丘脑前核、双额上回内侧(BA6)、右胼胝体下部(BA34)及小脑蚓部。2-back任务时,与MPFC负相关的功能连接脑区在患者组主要包括右小脑半球、左顶上小叶/楔前叶(BA7)、左额上回(BA6),对照组主要包括左丘脑背侧、双运动前区外侧(BA6)、左顶上小叶/楔前叶(BA7)、右小脑半球。患者组的反应正确率低于对照组[(78.30±8.76)%,(89.89±8.05)%,P=0.01],其执行正确率与左侧丘脑背侧的相关性有统计学意义(r=-0.52,P=0.04)。结论精神分裂症患者双侧岛叶及其相关网络的功能连接异常,提示边缘系统功能整合不良,在广泛脑功能连接减低的基础上,左侧丘脑背侧功能不连接可能是导致患者执行功能低下的原因之一。Objective To investigate the insula and its related network of schizophrenia patients and its correlation to behavior performance with functional magnetic resonance imaging. Methods Fourteen patients with paranoid schizophrenia and sixteen normal subjects received blood oxygenation level dependent functional magnetic resonance imaging(BOLD-fMRI) examinations based on resting state and digital 2-back working memory task. The fMRI data were processed and analyzed with SPM2, AFNI and Matlab software packages (thresholded at P = 0.005, uncorrected ). Medial prefrontal cortex (MPFC, BA10 ) was placed as region of interest (ROI). Results The functional connectivity positively or negatively correlated with MPFC was lower for patient group than that for control group in resting and task states. In resting state, the brain areas negatively correlated with MPFC mainly included the bilateral superior temporal gyrus ( BA22 ), cuneus ( BA18/19 ), inferior parietal lobule ( BA40), right parahippocampus for patient group and the bilateral insula/superior temporal gyrus ( BA22 ) , inferior parietal lobule( BA40), paracentral lobule, parahippocampus for control group. The brain areas positively correlated with MPFC mainly included the pineal gland areas for patient group and the left anterior nucleus thalamus, bilateral me- dial superior frontal gyms ( BA6), right inferior corpus callosum (BA34) and the cerebellar vermis for control group in resting state. In 2-back task, the brain areas negatively correlated with MPFC mainly included the right cerebellar hemisphere, left superior parietal lobule/precuneus ( BA7 ), left superior frontal gyrus ( BA6 ) for patient group and the left medial dorsal thalamus, bilateral lateral premotor area (BA6) ,left inferior parietal lobule/pre- cuneus ( BAT ), right cerebellar hemisphere for control group. The accuracy of reaction was lower in patient group than that in control group( (78.30 ± 8.76) % vs ( 89.89 ± 8.05 ) %, P
分 类 号:R445.2[医药卫生—影像医学与核医学]
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