急性轻度创伤性脑损伤与记忆障碍相关默认模式网络分析

Default mode network analysis associated with memory impairment in acute mild traumatic brain injury

目的观察轻度创伤性脑损伤(mTBI)患者记忆功能是否发生改变;在mTBI队列中探讨功能连通性(FC)变化与蒙特利尔认知评估(MoCA)量表评分之间是否存在相关性。方法前瞻性收集39例急性mTBI患者(急性mTBI组)和39例健康对照者(HC),对所有受试者进行rs-fMRI扫描,并计算两组FC的值。结果与HC组相比,急性mTBI组左后扣带回与左楔叶和右距状裂周围皮层的FC增强;左眶内额上回与右颞上回和右中央后回的FC增强,右海马旁回与右内侧和旁扣带脑回、右丘脑及右尾状核的FC减弱。相关性分析显示,MoCA量表评分与基于DMN网络节点的FC之间未发现显著相关性。结论急性mTBI患者的DMN网络受到破坏,患者记忆功能发生障碍。FC异常与MoCA量表评分之间未发现相关性。

Objective To observe the changes of memory function in patients with mild traumatic brain injury(mTBI),and to explore the correlation between functional connection(FC)changes and montreal cognitive assessment(MoCA)scale scores in the mTBI cohort.Methods Thirty⁃nine patients with acute mTBI and 39 healthy controls were prospectively collected.All subjects underwent rs⁃fMRI scans,and FC values were calculated in both groups.Results Compared with healthy controls,the FC of the left posterior cingulate cortex,the left cuneus and the right calcarine fissure were enhanced.The FC of the left orbital superior frontal gyrus with the right superior temporal gyrus and the right postcentral gyrus was enhanced,and the FC of the right parahippocampal gyrus with the right medial and lateral cingulate gyrus,right thalamus and right caudate nucleus was weakened.Correlation analysis showed that there was no significant correlation between MoCA scale score and FC based on DMN network nodes.Conclusion The DMN network was damaged in patients with acute mTBI,and the memory function was impaired.In addition,no correlation was found between FC abnormalities and MoCA scale scores in this study。