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在人类中,高频刺激诱导的二次过敏症的基础是神经相关物质

Sophie Clarke¹, Vishvarani Wanigasekera¹, Richard Rogers¹

¹Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom.

|October 20, 2025

概括

在健康个体中,高频电刺激 (HFS) 诱导了中央敏感性 (CS),其特征是疼痛敏感性增加和大脑活动改变. 这表明疼痛调节的转变从抑制向促进.

科学领域:

神经科学是一个神经科学.
疼痛研究疼痛研究
医疗成像医学成像

背景情况:

中央敏感性 (CS) 是慢性疼痛的一个关键机制,涉及到对刺激的强烈反应.
高频电刺激 (HFS) 用于实验性诱导CS.
在HFS诱导的CS背后的精确神经机制需要进一步阐明.

研究的目的:

在健康人群中研究HFS诱导的CS的神经相关物.
利用功能性磁共振成像 (fMRI) 绘制大脑活动变化的地图.
为了确定与HFS诱导的过敏症相关的大脑区域和连接模式.

主要方法:

18名健康参与者在HFS之前和之后接受了fMRI扫描.
神经活动在二级超痛症区域的有害点点刺激期间和休息期间测量.
进行了全脑分析和基于种子的功能连接分析 (使用水管灰和形核种子).

主要成果:

HFS诱导疼痛处理区域 (岛屿,环状皮质,丘脑,形核) 显著的过敏症和增加神经活动.
在HFS后,水道灰色和与疼痛相关的皮质区域 (insula,S2) 之间的功能连接性减少了.
这些发现揭示了与实验CS相关的特定大脑活动和连接性变化.

结论:

由HFS诱导的CS的神经相关物与其他实验模型 (如素) 相一致.
增加核形活动是CS模型中的一致的发现.
改变的功能连接性表明下降疼痛调制的转变,有利于促进抑制.

关键词:

中心敏感化引起的一个实验性疼痛模型.功能性磁共振成像 (fMRI) 是一种功能性磁共振成像.高频刺激 (HFS) 是一种高频刺激.疼痛疼痛疼痛疼痛二次性过敏症第二次过敏症.

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