通过隐藏马尔科夫建模研究刺激性肠综合征中的动态大脑功能
Chuan Jing1, Tianci Liu1, Qingzhou Li1
1Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
Frontiers in neuroscience
|January 28, 2025
概括
研究人员使用隐藏的马尔科夫模型 (HMM) 来分析刺激性肠综合征 (IBS) 患者的大脑活动. 确定了动态的大脑变化,为IBS神经机制和症状体验提供了新的见解.
科学领域:
- 神经科学是一个神经科学.
- 胃肠病学 胃肠病学
- 计算生物学 计算生物学
背景情况:
- 刺激性肠综合征 (IBS) 是一种普遍存在的疾病,其特征是不清楚的发病因子和改变的脑肠相互作用.
- 以前的研究表明,IBS患者的功能性大脑异常.
研究的目的:
- 用隐藏的马尔科夫模型 (HMM) 来研究IBS患者大脑功能中的动态变化.
- 探索大脑活动状态的时间性质及其与IBS临床症状的相关性.
主要方法:
- 休息状态功能磁共振成像 (rs-fMRI) 数据从35名IBS患者和31名健康对照 (HC) 收集.
- 隐藏马尔科夫模型 (HMM) 用于识别不同的大脑活动状态并分析它们的时间动态 (分数占用率,寿命和过渡概率).
- 研究了HMM状态属性与临床尺度得分之间的相关性.
主要成果:
- 确定了六种不同的HMM状态,在IBS患者和HC患者之间的5和6状态中观察到分数占用率和寿命的显著差异.
- 在IBS患者中发现了改变状态过渡的概率,特别是从状态2到状态6过渡的可能性增加.
- HMM状态的动态重组与默认模式网络 (DMN),传感动力网络 (SMN) 和 cingulo-opercular 网络 (CON) 中的异常活动相关.
结论:
- 这项研究为IBS中大脑活动模式的动态重组提供了新的见解.
- 这些发现表明,大脑动态变化与IBS相关的情绪调节和症状体验之间存在潜在的联系.
- 这项研究有助于更深入地了解IBS背后的神经机制.
相关概念视频
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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
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The pathogenesis of IBS involves a complex interplay of the following factors:
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Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
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