焦虑
基于体素的形态计量学
心理学
意识的神经相关物
纵向研究
帕金森病
前瞻性队列研究
体素
疾病
神经科学
内科学
精神科
医学
病理
磁共振成像
白质
认知
放射科
作者
Natalie Wee,Ming‐Ching Wen,Nagaendran Kandiah,Russell J. Chander,Aloysius Ng,Wing Lok Au,Louis C.S. Tan
标识
DOI:10.1016/j.jns.2016.10.021
摘要
Abstract
Background
Anxiety is prevalent in patients with Parkinson's disease (PD) and may affect patients' quality of life. Yet, little is known about the neural basis of anxiety in PD, and none have used a longitudinal design. Methods
73 patients with mild PD were recruited and followed up for 18months. A whole-brain analysis was first used to identify brain regions associated with anxiety symptoms, followed by a regional analysis focusing on a priori hypothesised regions at baseline. A multivariate generalized estimating equations analysis was then conducted to determine the longitudinal association between grey matter (GM) volumetric changes of these significant regions and changes of anxiety symptoms. Results
At baseline, anxiety symptom severity was associated with decreased GM volumes in the bilateral precuneus and anterior cingulate cortex (ACC). Over 18months, increased severity of anxiety symptoms was associated with decreased GM volume in the left precuneus and ACC, independent of age, gender, education, depressive symptom severity or use of psychiatric medication. Conclusions
These results mainly implicate the precuneus and ACC in the pathogenesis of anxiety in PD. We speculate that these structural changes could reflect the disrupted default mode network due to PD pathology, contributing to spontaneous anxiety-related self-focused thoughts.
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