Decreased interhemispheric functional connectivity in subtypes of Parkinson’s disease

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• 作者：Xiaofei Hu ; Jiuquan Zhang ; Xiaomei Jiang ; Chaoyang Zhou ; Luqing Wei…
• 关键词：Parkinson’s disease ; Subtypes ; Functional MRI ; Voxel ; mirrored homotopic connectivity
• 刊名：Journal of Neurology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：262
• 期：3
• 页码：760-767
• 全文大小：722 KB
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• 刊物类别：Medicine
• 刊物主题：Medicine & Public Health
  Neurology
  Neurosciences
  Neuroradiology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1459

文摘

Parkinson’s disease (PD) can be classified into tremor-dominant (TD) subtype and akinetic-rigid (AR) subtype, which exhibit different clinical courses and prognoses. However, the neural mechanisms underlying different subtypes of PD are not well understood. Using voxel-mirrored homotopic connectivity (VMHC), we examined the homotopic resting-state functional connectivity patterns in akinetic-rigid PD (AR-PD) and tremor-dominant PD (TD-PD) to study the neural basis for these disparate manifestations of PD. Twenty-one TD-PD patients, 29 AR-PD patients and 26 normal control subjects participated in this study. Resting-state fMRI data were analyzed using VMHC. Correlations between VMHC values and each clinical characteristic were also calculated. Compared with normal control subjects and subjects with AR-PD, subjects with TD-PD exhibited significantly lower VMHC values in the posterior lobe of the cerebellum. Moreover, tremor scores and VMHC values for the cerebellum were found to be significantly negatively correlated in TD-PD patients. By contrast, subjects with AR-PD exhibited lower VMHC values in the precentral gyrus compared with normal control subjects. These findings suggest that functional coordination between homotopic brain regions is impaired in AR-PD and TD-PD patients. This study provides evidence of both cerebellum-related connectivity deficits in TD-PD. The finding that VMHC values and tremor scores were significantly correlated suggests that VMHC measurements may be of potential clinical relevance in TD-PD.