Altered gray matter volume and functional connectivity in patients with herpes zoster and postherpetic neuralgia
| Autor: | Changhe Ren, Fugang Han, Guidong Dai, Guangxiang Chen, Maohua Wang, Yu Tang, Yan Xiao, Song Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Adult
Male medicine.medical_specialty Neuralgia Postherpetic urologic and male genital diseases computer.software_genre Herpes Zoster Neuroimaging Voxel Internal medicine Neural Pathways medicine Humans Gray Matter Molecular Biology Anterior cingulate cortex Aged Brain Mapping Postherpetic neuralgia business.industry General Neuroscience Functional connectivity Putamen Middle Aged medicine.disease Pathophysiology medicine.anatomical_structure nervous system Cardiology Female Neurology (clinical) Brainstem business computer Developmental Biology |
| Zdroj: | Brain Research. 1769:147608 |
| ISSN: | 0006-8993 |
| DOI: | 10.1016/j.brainres.2021.147608 |
| Popis: | Numerous neuroimaging studies on postherpetic neuralgia (PHN) and herpes zoster (HZ) have revealed abnormalities in brain structure/microstructure and function. However, few studies have focused on changes in gray matter (GM) volume and intrinsic functional connectivity (FC) in the transition from HZ to PHN. This study combined voxel-based morphometry and FC analysis methods to investigate GM volume and FC differences in 28 PHN patients, 25 HZ patients, and 21 well-matched healthy controls (HCs). Compared to HCs, PHN patients exhibited a reduction in GM volume in the bilateral putamen. Compared with HZ patients, PHN patients showed decreased GM volume in the left parahippocampal gyrus, putamen, anterior cingulate cortex, and right caudate and increased GM volume in the right thalamus. However, no regions with significant GM volume changes were found between the HZ and HC groups. Correlation analysis revealed that GM volume in the right putamen was positively associated with illness duration in PHN patients. Furthermore, lower FCs between the right putamen and right middle frontal gyrus/brainstem were observed in PHN patients than in HCs. These results indicate that aberrant GM volumes and FC in several brain regions, especially in the right putamen, are closely associated with chronification from HZ to PHN; moreover, these changes profoundly affect multiple dimensions of pain processing. These findings may provide new insights into the pathophysiological mechanisms of PHN. |
| Databáze: | OpenAIRE |
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