摘要
目的应用基于体素的形态学测量方法(VBM)考察帕金森病轻度认知功能障碍(Parkinson’s disease withmild cognitive impairment,PD-MCI)特异的大脑灰质结构异常改变。方法采集50例PD患者(25例PD-MCI,25例PD未合并MCI,PD-NCI)及25例健康对照组(healthy control,HC)的全脑高分辨率T1加权结构像及包含5个认知域的神经心理量表。结果与PD-NCI及HC组相比,PD-MCI组双侧壳核及右侧尾状核体积显著下降。进一步分析发现,PD患者双侧壳核体积分别与执行功能及语言能力成正相关,此外,右侧壳核/尾状核体积与记忆成正相关。结论 PD-MCI基底节体积特异性萎缩与PD认知功能损害有关。该结果提示基底节形态学改变可能是PD-MCI的潜在影像学标记物。
Objective The present study aimed to examine the specific structural alterations in Parkinson's disease with mild cognitive impairment( PD-MCI). Methods Fifty patients with PD classified into 25 PD-MCI and 25 PD with no MCI( PD-NCI)and 25 healthy control( HC),who underwent T1-weighted structural MRI and neuropsychological assessments of five domains,were recruited in the present study. Voxel-based morphometry( VBM) analysis was performed to detect the structural atrophy inPD-MCI and its association with cognitive performance was further explored. Results Compared to PD-NCI and HC,reducedgrey matter volume( GMV) was observed in the bilateral putamen and right caudate specifically for PD-MCI. Further,it wasfound that reduced GMV in the bilateral putamen was positively correlated with executive function and language performance,anddecreased GMV in the right putamen/caudate was additionally positively correlated with memory. Conclusion PD-MCI exhibitedspecific basal ganglia atrophy,which was contributed to cognitive decline in PD. These findings suggest that basal ganglia alteration might be a potential biomarker for PD-MCI.
引文
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