PAIN AND THERAPY: 丘脑FC异常可能是偏头痛致病机制

2022-06-23 影像小生 MedSci原创

偏头痛患者双侧丘脑VMHC改变,双侧丘脑等脑区FC异常。丘脑FC异常可能是偏头痛发生的机制之一。

偏头痛是一种常见的头痛疾病。许多研究利用磁共振成像(MRI)来探讨偏头痛可能的发病机制,但缺乏严格的多重比较校正,并没有得出一致的结论.

PAIN AND THERAPY 期刊最近刊发Zi-Min Cao等的研究成果,该研究采用数据驱动和兴趣区(ROI)为基础的方法,从脑区功能连接改变(FC)的角度探讨偏头痛的发生机制。

该研究收集了30名偏头痛患者和40名年龄、性别和教育程度相匹配的健康对照(hc)的静息态fMRI数据。对于数据驱动的方法,使用体素镜像同伦连接(VMHC)方法来比较患者和hc之间的FC。对于基于ROI的方法,将患者与hc之间VMHC图的显著差异定义为ROI。基于种子的方法进一步揭示了种子和其他大脑区域之间FC的显著差异。探讨FC异常与患者临床特征的相关性。采用严格的多重比较校正,FDR和排列检验(5000次)。

该研究发现:

1.与对照组相比,患者双侧丘脑VMHC增强。

2.还观察到患者左丘脑和左额上回之间的FC增强,以及右丘脑和左额中回(Brodmann 45区和Brodmann 8区)之间的FC增加。

3.进一步分析表明,左侧额上回和左侧额中回的FC值与视觉模拟评分或头痛发作次数呈负相关。

偏头痛患者VMHC改变的脑区。与健康对照组相比,偏头痛患者双侧丘脑VHMC明显增高。

偏头痛患者FC改变的脑区。

左侧SFG和左侧MFG的VAS评分、头痛发作次数与FC的相关性

总的来说,虽然该研究的发现需要使用更大的样本量来验证,但目前的结果表明,丘脑功能连接异常可能是偏头痛发生的一个机制静息态功能磁共振成像可能是区分偏头痛和其他类型头痛的一个基本诊断模式。对偏头痛潜在机制的科学解释需要越来越多的关注。

 

原文出处

Cao, ZM., Chen, YC., Liu, GY. et al. Abnormalities of Thalamic Functional Connectivity in Patients with Migraine: A Resting-State fMRI Study. Pain Ther 11, 561–574 (2022). https://doi.org/10.1007/s40122-022-00365-1.

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