视觉增益操纵在恒定同位收缩过程中对力变化和平滑性的明显影响
Joongsuk J Kim1, Vinay R Shankar1, Stefan Delmas1
1Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
Journal of neurophysiology
|December 18, 2025
概括
增加视觉反收益降低了力变性,但降低了年轻成年人的力平滑性. 这表明不同的生理过程是力量控制的基础,受同位数收缩期间视觉收益的影响.
科学领域:
- 发动机控制器的控制器
- 人类生理学 人类生理学
- 神经科学是一个神经科学.
背景情况:
- 视觉反收益影响在同度收缩期间的力量控制.
- 之前的研究集中在力变性上,忽视了力平滑性.
- 视觉增益,力变化和力平滑之间的关系需要进一步调查.
研究的目的:
- 为了检查视觉反增强效应对力变化和力平滑性在同度脚背部屈曲期间的影响.
- 在不同的视觉反条件下区分力变化和平滑性的生理基础.
主要方法:
- 14名年轻成年人在10%的最大自愿收缩下进行了对称脚背部屈曲.
- 参与者使用低收益 (LG) 或高收益 (HG) 的视觉反.
- 使用功率光谱密度分析量化了力变化 (SDF,CVF),力平滑度 (YANK) 和肌肉活动 (EMG).
主要成果:
- 高强度反导致较低的力变性 (SDF,CVF) 和较低的力平滑性 (YANK).
- 降低的力量变化与降低的低频 (0-0.5 Hz) 力量振荡和中频 (1.5-2 Hz) 肌肉活动相关.
- 降低力平滑度与中频 (7-8 Hz) 力振荡和高频 (35-60 Hz) 肌肉活动的增加相关.
结论:
- 强力变化和强力平滑性是不同的指标,反映了不同的生理过程.
- 视觉反增益在同度收缩期间差异调节这些过程.
- 这些发现提升了我们对感觉运动控制和视觉运动适应的理解.
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