沿皮质脊髓网络对有害热和自我报告的疼痛的差异编码:同时进行脊髓-大脑fMRI研究
Dario Pfyffer1, Yiyu Wang1, Merve Kaptan1
1Stanford University School of Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Palo Alto, United States.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
研究人员使用功能性MRI (fMRI) 研究大脑和脊髓如何处理疼痛强度. 他们发现脊髓活动跟踪刺激温度,而大脑区域编码主观疼痛,为慢性疼痛机制提供了洞察力.
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:
- 慢性疼痛是一个重要的公共卫生问题.
- 了解中枢神经系统 (CNS) 如何处理疼痛对于开发新疗法至关重要.
- 功能性MRI (fMRI) 是研究 nociception 期间神经活动的一个有价值的工具.
研究的目的:
- 研究大脑和脊髓如何编码刺激强度和主观疼痛感知.
- 探索皮质脊髓活动和连接模式,以应对受控有害热刺激.
- 在健康个体中识别疼痛处理背后的神经机制.
主要方法:
- 同时的脊髓-大脑fMRI在28名健康女性中使用.
- 对前臂施加了三种强度 (46°C,47°C,48°C) 的受控有害热刺激.
- 代表性相似性分析 (RSA) 用于分析神经模式.
主要成果:
- 随着刺激温度的增加,大脑和脊髓参与疼痛处理的区域的活动增加.
- 观察到脊髓-大脑功能连接,并与疼痛评级积极相关.
- 大脑和脊髓中的多维素模式跟踪了刺激温度,而只有某些皮质区域编码主观疼痛.
- 脊髓表示主要由刺激温度组织,而不是感知到的疼痛强度.
结论:
- 同时的脊髓-大脑fMRI和多变量建模可以区分感官和感知成分的 nociception.
- 这些发现促进了对神经轴上疼痛处理的机械学理解.
- 这种方法可能有助于开发基于中枢神经系统的生物标志物,用于慢性疼痛评估和干预.
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