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视觉调节由前体唤起的平衡反应被后皮层缩扰乱

Dilek Ocal¹, Brian L Day², Amy Peters²

¹Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.

The Journal of physiology

|October 19, 2025

概括

后皮层缩 (PCA) 患者对平衡控制的视觉影响减少,影响前庭整合. 这表明,被破坏的尾-尾路径有助于平衡PCA中的问题,与感知直立缺陷不同.

科学领域:

神经科学是一个神经科学.
人体生理学人体生理学
神经学神经学

背景情况:

在典型的阿尔茨海默氏症 (tAD) 和后皮层缩 (PCA) 中,直立感受受到损害.
之前的研究将这些干扰归因于严重感知信息的空间转换中断.
这项研究调查了姿势期间直立的前体控制,重点是与自感和视觉输入的整合.

研究的目的:

在不同的视觉和自感条件下,检查全身平衡对电动前庭刺激 (GVS) 的反应.
为了比较健康参与者,tAD患者和PCA患者的这些反应.
识别潜在的神经通路参与视觉调制前庭平衡控制和空间定向和平衡中的解离.

主要方法:

在健康对照组 (n=21),tAD (n=18) 和PCA (n=18) 组中引起了对GVS的平衡反应.
条件包括自感 - 垂体整合 (头转,没有视力) 和视觉 - 垂体整合 (头直,有/没有视力).
分析了GVS引起的响应的方向和大小,重点关注早期的机械指标.

主要成果:

在没有视觉的情况下,GVS引起的平衡反应在所有组中都是可比的,这表明节省了自感 - 垂体整合.
与对照组和tAD相比,PCA组的视力对GVS引起的响应大小的调节效应显著减少.
在机械反应早期观察到PCA的视觉调制减少,这表明前视觉影响减少.
在PCA中,过度反应大小与视力相关,与尾 - thalamic结构异常相关.

结论:

当视力缺失时,在tAD和PCA中,自受体-前置体整合和前置体-运动系统似乎没有受到影响.
后皮层缩与减少整合视觉信息以控制前庭平衡的能力有关,这与尾 - thalamic通路中断有关.
在PCA中,负责感知直立和快速传感运动平衡控制的系统之间存在分离,突出了明显的空间定向缺陷.

关键词:

阿尔茨海默病的疾病阿尔茨海默病的疾病.动前庭刺激动前庭刺激多感应处理是多感应处理.后皮层缩后皮层缩姿势控制姿势控制常态余额常态余额常态余额常态余额

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