中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (5): 685-689.doi: 10.3969/j.issn.2095-4344.2999

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

静息态脑功能成像评价夜磨牙者的大脑默认网络

靖慧敏1,余雯娟1,王思佳2,陈  聪2,李逸凡2,王永兰3,李  欣3,张  娟1,梁  猛2   

  1. 天津医科大学口腔医院,1修复科,3牙周科,天津市  300070;2天津医科大学医学影像学院及天津市功能影像重点实验室,天津市  300203
  • 收稿日期:2020-03-11 修回日期:2020-03-18 接受日期:2020-04-11 出版日期:2021-02-18 发布日期:2020-11-28
  • 通讯作者: 张娟,博士,副主任医师,天津医科大学口腔医院修复科,天津市 300070 梁猛,博士,教授,天津医科大学医学影像学院及天津市功能影像重点实验室,天津市 300203
  • 作者简介:靖慧敏,女,山东省济南市人,汉族,2020年天津医科大学毕业,硕士,主要从事口腔修复与关节、脑功能研究。
  • 基金资助:
    国家自然科学基金面上项目(81971694)

Resting-state functional magnetic resonance imaging evaluation of the brain’s default mode network in patients with sleep bruxism

Jing Huimin1, Yu Wenjuan1, Wang Sijia2, Chen Cong2, Li Yifan2, Wang Yonglan3, Li Xin3, Zhang Juan1, Liang Meng2   

  1. 1Department of Prosthodontics, 3Department of Periodontics, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; 2School of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University, Tianjin 300203, China
  • Received:2020-03-11 Revised:2020-03-18 Accepted:2020-04-11 Online:2021-02-18 Published:2020-11-28
  • Contact: Zhang Juan, MD, Associate chief physician, Department of Prosthodontics, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China Liang Meng, MD, Professor, School of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University, Tianjin 300203, China
  • About author:Jing Huimin, Master, Department of Prosthodontics, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
  • Supported by:
    the National Natural Science Foundation of China (General Project), No. 81971694

摘要:

文题释义:
独立成分分析方法(ICA):在源信号(S)和混合矩阵(A)未知的条件下仅通过测量的记录信号(X)对源信号作出估计的过程。核心思想:求取一个解混矩阵W使得X通过该矩阵后所得输出U是S的最优逼近(U各分量最大化独立)。独立成分分析方法可以将fMRI中混合信号分解成大脑所发出的真正的独立信号,因此是一种分析fMRI的常用方法。
默认网络(DMN):人的大脑在安静状态下也在活动,展现一种不同于任务时的激活状态,大脑静息态的功能运动就是靠激活的脑区通过协调一致的活动来完成的,被激活的脑区就组成了一个网络,称为默认网络。目前,默认网络被广泛认为是大脑自主意识与自发行为的神经基础,也与很多神经疾病、心理障碍等息息相关。而夜磨牙多被认为与心理因素有关,因为以前没有对夜磨牙患者做静息态fMRI试验,没有先验的脑区作为参考,所以选择了默认网络进行初步分析。

背景:夜磨牙是常见的一种口腔副功能,但是其病因现在尚不明确。通过很多对夜磨牙患者进行心理调查问卷发现,夜磨牙与心理因素有关,但是二者之间的具体联系与机制并不清晰。
目的:分析夜磨牙患者大脑默认网络的改变,探讨夜磨牙患者静息态脑网络状态。
方法:自2018年11月至2019年5月对20名经多导睡眠监测确诊的夜磨牙患者(夜磨牙组)及20名年龄、性别、受教育年限相匹配的无症状志愿者(对照组),在夜间20:00至23:00点采用3.0T核磁共振扫描仪行静息态脑功能磁共振成像检查,采用独立成分分析方法分离静息态脑网络,提取默认网络的成分进行统计学分析,首先使用单样本t 检验制作网络成分模板,然后使用双样本t 检验进行默认网络成分的比较。
结果与结论:夜磨牙组楔前叶默认网络内功能连接较对照组减弱,差异有显著性意义(t=-3.319,P < 0.05),提示夜磨牙患者大脑静息态时默认网络存在异常。
https://orcid.org/0000-0003-0911-8913 (靖慧敏) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 功能性磁共振成像, 静息态, 默认网络, 楔前叶, 多导睡眠监测, 心理, 口腔, 夜磨牙

Abstract: BACKGROUND: Sleep bruxism is a common oral accessory function, but the etiology is not yet clear. A psychological questionnaire survey on patients with nocturnal molars reveals that sleep bruxism is related to psychological factors, but the specific relationship and mechanism between them are not clear.
OBJECTIVE: To analyze the changes of brain’s default mode network (DMN) in patients with sleep bruxism and to investigate the DMN status of patients with sleep bruxism. 
METHODS: From November 2018 to May 2019, 20 patients with sleep bruxism (sleep bruxism group) diagnosed by polysomnography and 20 age-, gender-, and education-matched asymptomatic adults (control group) were recruited in the study. Brain resting-state functional MRI data were collected on a 3.0T scanner during 20:00 to 23:00. The MRI data were analyzed using independent component analysis method to extract the component of DMN. The one-sample t-test was used to make a network component template, and then the two-sample t-test used to compare the DMN components between the two groups.
RESULTS AND CONCLUSION: Compared with asymptomatic controls, patients with sleep bruxism showed a significantly weaker functional connectivity of the precuneus within the DMN (t=-3.319, P < 0.05), indicating that patients with sleep bruxism show abnormal functional connectivity within the DMN at brain-resting state.

Key words: functional MRI, resting state, default mode network, precuneus, polysomnography, psychology, oral cavity, sleep bruxism

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