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视觉唤起的姿势反应对小,快速的刺激在天真的参与者
Sisuri G Hemakumara1, Juan Forero1, Keith K Fenrich1,2
1Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada.
Experimental brain research
|March 23, 2025
概括
小的,快速的视觉刺激可以触发姿势修正,即使视觉运动是假的. 尽管反复暴露或添加触摸反,这种反应仍然存在,这表明视觉主导感知自我运动.
科学领域:
- 人类的感觉运动控制
- 视觉-体感一体化 视觉-体感一体化
背景情况:
- 视觉反对于保持姿势稳定和纠正意想不到的自我运动至关重要.
- 以前的研究经常使用持续或振荡的视觉刺激,专注于平均反应.
研究的目的:
- 为了确定小,快速的视觉位移是否引起姿势纠正.
- 调查是否重复暴露或轻触将虚假的视觉自我运动刺激清晰化.
主要方法:
- 参与者经历了快速的 (2.5厘米,130毫米/秒的峰值速度) 斜坡和保持视觉周围的移位.
- 通过压力中心 (COP) 运动来测量姿势反应.
- 测试了两个组:没有触摸和轻触摸反.
主要成果:
- 所有参与者最初都与视觉刺激方向 (延迟时间~240毫秒) 摇摆.
- 触摸反降低了响应幅度,但没有消除它.
- 响应随着重复而减少,但直到第10试验仍可检测到.
结论:
- 小的,快速的视觉刺激有效地诱导对感知到的自我运动进行姿势纠正.
- 无论是重复的视觉暴露还是额外的体感 (触觉) 输入都不能完全解决虚假的自我运动感知.
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