皮质下血管性痴呆患者脑注意和执行功能区激活特征及与认知功能损害的相关性

目的 分析皮质下血管性痴呆( subcortical ischemic vascular dementia,SIVD)患者脑注意和执行功能区激活特征及其与认知功能损害的相关性.方法 SIVD患者20例,健康对照组20名,按年龄、性别、文化层次进行配对.采用Stroop任务和SEMENTS 3.0T MRI仪行功能MRI,将脑功能区激活表现与认知功能损害特征进行相关分析.结果 SIVD患者双侧背外侧前额叶、腹外侧前额叶和后顶叶激活体积均与MoCA总分、视空间与执行、注意、语言、延迟回忆、定向分项得分明显相关(r =0.447～0.837,P＜0.05).结论 Stroop任务引起的功能MRI脑激活图可以反映SIVD患者认知功能的损害.

Activity of attentional and executive cortex and its relationship with cognitive impairment in subcortical ischemic vascular dementia

Objective To investigate the activity of attentional and executive cortex and its relationship with cognitive impairment in subcortical ischemic vascular dementia (SIVD).Methods Twenty patients with SIVD and twenty normal control subjects who were matched by age,sex and education were enrolled.All of them underwent fMRI using SEMENTS 3.0T MR during Stroop task performance. The correlation between cognitive impairment and cortex activation in fMRI was analyzed.Results Cortical activation of bilateral dorsolateral prefrontal cortex,Nentrolateral prefrontal cortex,inferior parietal lobe have closed correlation with total score,visual trabecular spaces and execution,attention,verbalization,delayed memory and orientation score in MoCA test ( r =0.447-0.837,P ＜ 0.05 ).Conclusions Cortex activation in fMRI can reflex the cognitive impairment of SIVD.