在动前庭刺激期间持续的姿势感知性头 (PPPD) 的功能性大脑活动揭示了多感觉前庭皮层网络中的敏感性
Renana Storm1, Viktoria Wrobel1, Antonia Frings1
1Department of Neurology, University Hospital Schleswig-Holstein, Lübeck, Germany.
Scientific reports
|July 27, 2025
概括
持久的姿势感知性头 (PPPD) 患者表现出大脑对前体刺激的兴奋性增加,这表明感觉神经放大. 这种高反应与PPPD患者的残疾和姿势失衡增加有关.
科学领域:
- 神经科学是一个神经科学.
- 垂体系统研究研究 垂体系统研究
- 临床心理学 临床心理学
背景情况:
- 持久的姿势感知性头 (PPPD) 经常跟随前置障碍.
- 导致PPPD的神经机制及其与前庭功能障碍的联系需要进一步阐明.
研究的目的:
- 在患有PPPD的患者中,研究大脑激发性对前庭刺激的反应.
- 探索前庭刺激,感知自我运动和PPPD中的功能障碍之间的关系.
主要方法:
- 在fMRI过程中,对28名PPPD患者和28名健康对照人群 (HC) 进行了Galvanic vestibular stimulation (GVS).
- 参与者评价了他们感知的自我运动,并评估了残疾和姿势稳定的行为措施.
- 分析了fMRI数据,以比较不同组之间的大脑激活,并与临床措施相关联.
主要成果:
- 与HC患者相比,PPPD患者的GVS感知值较低,在上边脊髓,岛内皮质和虫子中表现出更强的激活,而HC患者的GVS感知值较低.
- 在PPPD患者中,GVS引起了更大的感知自我运动和大脑激活,但大脑活动与自我运动的比例是相似的.
- 由GVS引起的岛屿活动增加与较高的PPPD残疾和姿势失衡相关.
结论:
- PPPD患者表现出升高的前庭皮层刺激性,这表明感觉神经放大而不是改变的感觉感知缩放.
- 这种对前庭刺激的过敏性可能会导致PPPD的症状和功能限制.
- 这些发现突出了多感官皮质前庭网络在PPPD病理生理学中的作用.
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