偏执型精神分裂症患者基础及认知激活局部脑血流研究

Baseline and cognition activated regional cerebral brain flow of naive paranoid schizophrenics

目的 探讨未用抗精神病药治疗的偏执型精神分裂症患者基础与认知激活状态局部脑血流 (rCBF)灌注特点及其症状与血流灌注间的关系。方法 采用阳性及阴性症状量表 (PANSS)评定研究组疾病严重程度。采用双日法行基础及认知激活状态99Tcm 双半胱乙酯 (ECD)脑SPECT断层显像。采用Wisconsin卡片分类试验 (WCST)进行认知激活。结果 研究组与对照组WCST结果差异无显著性 (P >0 .0 5 )。与对照组相比 ,基础状态时研究组左、右颞叶后下部rCBF灌注比值明显增加(P <0 .0 5 ) ,左额叶中中部rCBF比值明显下降。认知激活状态与基础状态相比 ,对照组左额叶外侧中部及右枕叶上部的rCBF比值明显增加 ,而研究组各个感兴趣区 (ROI)rCBF比值差异无显著性。PANSS总分、阳性因子分及一般病理因子分与左额颞部上部、左颞叶后上部、右枕叶上部、左顶叶外侧部、右颞叶后上部及左右颞顶部等ROI的rCBF比值呈正相关 ,妄想、幻觉行为、兴奋及敌对性评分与右颞叶后上部、右壳核、右丘脑、左额叶外侧上下部、右颞枕部等ROI的rCBF比值正相关 ,而概念紊乱则与右壳核及右丘脑的rCBF比值呈负相关。结论 偏执型精神分裂症患者在治疗前可能伴有额叶功能低下 ,其阳性症状严重程度与大脑不同部位的血流灌注特点有关。

ObjectiveTo investigate the baseline and cognition activated regional cerebral blood flow (rCBF) in naive paranoid schizophrenics and the relationships between the symptoms and rCBF. MethodsThe scale of positive and negative syndrome scale (PANSS) was adopted to evaluate the symptoms of schizophrenia. The baseline and cognition activated 99Tcm-ethylcysteinate dimmer (ECD) SPECT were performed one after the other within two days. Wisconsin card sorting test (WCST) was used as cognitive task. Semi-quantitative analyses were applied. ResultsThere were no significant differences of WCST results between two groups. Compared with normal controls, the baseline rCBF ratios of left to right inferior posterior temporal cortex in patients were significantly higher, while that of left mid-medial frontal cortex was significantly lower in patients. There was no significant difference of rCBF ratios of baseline to cognition activated states in patients. WCST couldn't activate the frontal function in patients. The total score of PANSS, score of positive subscale and general symdrome subscale were correlated with the rCBF ratio of several regions of interest (ROIs). Some symptoms were correlated with the rCBF ratio of some ROIs. ConclusionsThe hyperperfusion of left and right temporal inferior posterior cortex and hypoperfusion of left mid-medial frontal cortex could be seen in naive paranoid schizophrenics. Hypofrontality existed in patients before treatment. Some positive symptoms were correlated with the rCBF of some ROI.